Time prefs: rework time zone view

* Add country flags back to the time zone view.
* Use Appearance color constants.

More Time preflet improvements:
* fixed another instance of BToolTip deletion, when we should be releasing
a reference instead (the first one was fixed by Rene - thanks BTW!)
* brought BCountry back into the game, such that the localized name of the
country is now being used, where possible (avoiding the " Time" suffixes
in English)
* country-items containing only one timezone are now being filtered (the
timezone moves up one level, replacing the country item, but adopting
the country's name)
* added the date to the timezone-item's tooltip, in order to make it obvious
which timezone is "before" and which is "behind" the date-borderline
I'm pretty happy with how it works now - what's yet missing is conversion of
the preflet to the layout kit and localization of the GUI.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38382 a95241bf-73f2-0310-859d-f6bbb57e9c96

Optimized Time preflet:
* use upon-demand initialization in BTimeZone to avoid unnecessary work
* renamed BTimeZone::Code() to BTimeZone::ID() and adjusted all callers
* avoid using BCountry in the Time preflet for the time being, this means
the icon-flags are gone for now (but they could be re-added if the demand
is pressing ;-)
* group the timezones by regions and then by country instead
The performance improvement is considerable and I personally think the new grouping is an improvement, too. Please share your thoughts!


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38322 a95241bf-73f2-0310-859d-f6bbb57e9c96

Largish cleanup sweep concerning the Locale Kit (sorry it got so big):
* refactored private/mutable stuff out of LocaleRoster into MutableLocaleRoster
* moved management of Locale/Time settings file and broadcasting of any changes
out of preflets and into MutableLocaleRoster
* added proper sorting to the listviews of the Locale preflet
* the Time preflet no longer overlaps long timezone names into the actual time
* several fixes with respect to leaking ICU objects, esp. in BCountry
* the locale roster no longer passes out references to its own BCountry object,
but uses copies, instead - this makes locking superfluous, as the clients'
BCountry objects can no longer be changed by the setting a new default
country in the locale roster
* removed pretty useless POSIX-style symbol fetching from BCountry - if we
need that at all, it should live in the dedicated formatter classes
* adjusted readonlybootprompt, dstcheck and Deskbar to the changed Locale API
* refactored existing Time-formatter into TimeUnitFormat and DurationFormat
(the latter of which is now used by AboutSystem)
* added stubs for Date, DateTime and Time formatters
* lots of coding style fixes throughout the Locale Kit and the Locale and Time
preflets
This will probably break most external apps making use of the Locale Kit - it
does break WebPositive.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37831 a95241bf-73f2-0310-859d-f6bbb57e9c96

Improved the Time preflet (still not working properly, though)
* basically rewrote TimeZone to sport a nicer to use interface
* adjusted all users of TimeZone accordingly
* changed TZDisplay to show the Date next to the label, in
order to avoid that long timezone names draw all over it
* the timezone listview is now properly sorted according
to the current language (using BCollator)
* fixed a couple of bugs (overflows, etc.) that caused
incorrect GMT offsets to be used during computations


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37813 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Rewrote the timezone selection part of the time preflet to make use of ICU instead of our custom TZData.
* Not completely working yet, hte POSIX API isn't very happy about ICU timezone names.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37758 a95241bf-73f2-0310-859d-f6bbb57e9c96

Time prefs: rework time zone view

* Add country flags back to the time zone view.
* Use Appearance color constants.

More Time preflet improvements:
* fixed another instance of BToolTip deletion, when we should be releasing
a reference instead (the first one was fixed by Rene - thanks BTW!)
* brought BCountry back into the game, such that the localized name of the
country is now being used, where possible (avoiding the " Time" suffixes
in English)
* country-items containing only one timezone are now being filtered (the
timezone moves up one level, replacing the country item, but adopting
the country's name)
* added the date to the timezone-item's tooltip, in order to make it obvious
which timezone is "before" and which is "behind" the date-borderline
I'm pretty happy with how it works now - what's yet missing is conversion of
the preflet to the layout kit and localization of the GUI.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38382 a95241bf-73f2-0310-859d-f6bbb57e9c96

Optimized Time preflet:
* use upon-demand initialization in BTimeZone to avoid unnecessary work
* renamed BTimeZone::Code() to BTimeZone::ID() and adjusted all callers
* avoid using BCountry in the Time preflet for the time being, this means
the icon-flags are gone for now (but they could be re-added if the demand
is pressing ;-)
* group the timezones by regions and then by country instead
The performance improvement is considerable and I personally think the new grouping is an improvement, too. Please share your thoughts!


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38322 a95241bf-73f2-0310-859d-f6bbb57e9c96

Largish cleanup sweep concerning the Locale Kit (sorry it got so big):
* refactored private/mutable stuff out of LocaleRoster into MutableLocaleRoster
* moved management of Locale/Time settings file and broadcasting of any changes
out of preflets and into MutableLocaleRoster
* added proper sorting to the listviews of the Locale preflet
* the Time preflet no longer overlaps long timezone names into the actual time
* several fixes with respect to leaking ICU objects, esp. in BCountry
* the locale roster no longer passes out references to its own BCountry object,
but uses copies, instead - this makes locking superfluous, as the clients'
BCountry objects can no longer be changed by the setting a new default
country in the locale roster
* removed pretty useless POSIX-style symbol fetching from BCountry - if we
need that at all, it should live in the dedicated formatter classes
* adjusted readonlybootprompt, dstcheck and Deskbar to the changed Locale API
* refactored existing Time-formatter into TimeUnitFormat and DurationFormat
(the latter of which is now used by AboutSystem)
* added stubs for Date, DateTime and Time formatters
* lots of coding style fixes throughout the Locale Kit and the Locale and Time
preflets
This will probably break most external apps making use of the Locale Kit - it
does break WebPositive.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37831 a95241bf-73f2-0310-859d-f6bbb57e9c96

Improved the Time preflet (still not working properly, though)
* basically rewrote TimeZone to sport a nicer to use interface
* adjusted all users of TimeZone accordingly
* changed TZDisplay to show the Date next to the label, in
order to avoid that long timezone names draw all over it
* the timezone listview is now properly sorted according
to the current language (using BCollator)
* fixed a couple of bugs (overflows, etc.) that caused
incorrect GMT offsets to be used during computations


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37813 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Rewrote the timezone selection part of the time preflet to make use of ICU instead of our custom TZData.
* Not completely working yet, hte POSIX API isn't very happy about ICU timezone names.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37758 a95241bf-73f2-0310-859d-f6bbb57e9c96