ProcessController: Utilize ComposeIconSize and refactor icon menu items.

* All MenuItem variants which draw icons now derive from IconMenuItem
and use its functions to draw and otherwise manage their icons. This
resolves a number of TODOs and reduces code duplication.

* Use BControlLook::ComposeIconSize() to compose icon sizes throughout.

* Remove unused methods from IconMenuItem.

ProcessController: Relicense as MIT.

We received permission from the original author and all relevant contributors
(see the mailing list) to do this. (As best as can be established, BeUnited
did not modify the source code after importing besides adding their copyright.)

ProcessController: fix bars height computation

The previous code used a fixed margin, which would lead to too small
bars with small font sizes (the bar content would not even be visible).

Instead, use the font height as the base for the bar height, which
allows us to use the same code everywhere, no matter the menu item
height (which can vary depending on if there is an icon, etc)

Fixes #15391.

ProcessController: Fixed bars so they are aligned in center and scale
with the selected fonts

Change-Id: I016c600d62ea28d4197f94f29ec0c372b5a87169
Reviewed-on: https://review.haiku-os.org/c/haiku/+/1848
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

User interface: Use user colors in menu and list items.
* Use user colors for selected menuItem in ProcessController
* Use user colors for selected listItem in FileTypes, Media, Printers
* Fixes the menuItem and listItem part of #10840.
The BColumnListView and other widgets need more thoughts.

ProcessController: Fix CID 701784

Unchecked return value (CHECKED_RETURN)

If get_team_usage_info() fails set the times to 0.

Also remove unused get_team_info() call.

ProcessController: Check if pointers are NULL

ProcessController: style fixes to TeamBarMenuItem

kernel, libroot: Introduce new API for obtaining system info

Patch by Vasilis Kaoutsis:
* Style cleanup.
* Renamed class GebsPreferences to Preferences.
* Made NoiseBarMenuItem::fBusyWaiting/fLost private and added getters
and setters.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23498 a95241bf-73f2-0310-859d-f6bbb57e9c96

* use B_RGBA32 icons when compiled for Haiku


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19312 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Moved "install to Deskbar" alert into the application.
* If you install ProcessController to the Deskbar after startup, its window
is not opened anymore.
* When you install ProcessController, the Deskbar is only restarted if needed;
this can probably be removed completely under Haiku.
* Renamed some menu items.
* Removed "Use Pulse's settings" menu item.
* Fixed remaining issues from bug #633 as far as ProcessController was concerned.
* Removed unused source files.
* Big cleanup, even though there could be done much much more.
* Compacted the source files a bit, merged PCView.cpp and PCView2.cpp to
ProcessController.cpp to match the name of the class.
* Renamed PCUtils.{cpp|h} to Utilities.{cpp|h}


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17647 a95241bf-73f2-0310-859d-f6bbb57e9c96

Imported ProcessController from BeUnited's CVS into our repository.
Doesn't compile yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17568 a95241bf-73f2-0310-859d-f6bbb57e9c96

User interface: Use user colors in menu and list items.
* Use user colors for selected menuItem in ProcessController
* Use user colors for selected listItem in FileTypes, Media, Printers
* Fixes the menuItem and listItem part of #10840.
The BColumnListView and other widgets need more thoughts.

ProcessController: Fix CID 701784

Unchecked return value (CHECKED_RETURN)

If get_team_usage_info() fails set the times to 0.

Also remove unused get_team_info() call.

ProcessController: Check if pointers are NULL

ProcessController: style fixes to TeamBarMenuItem

kernel, libroot: Introduce new API for obtaining system info

Patch by Vasilis Kaoutsis:
* Style cleanup.
* Renamed class GebsPreferences to Preferences.
* Made NoiseBarMenuItem::fBusyWaiting/fLost private and added getters
and setters.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23498 a95241bf-73f2-0310-859d-f6bbb57e9c96

* use B_RGBA32 icons when compiled for Haiku


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@19312 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Moved "install to Deskbar" alert into the application.
* If you install ProcessController to the Deskbar after startup, its window
is not opened anymore.
* When you install ProcessController, the Deskbar is only restarted if needed;
this can probably be removed completely under Haiku.
* Renamed some menu items.
* Removed "Use Pulse's settings" menu item.
* Fixed remaining issues from bug #633 as far as ProcessController was concerned.
* Removed unused source files.
* Big cleanup, even though there could be done much much more.
* Compacted the source files a bit, merged PCView.cpp and PCView2.cpp to
ProcessController.cpp to match the name of the class.
* Renamed PCUtils.{cpp|h} to Utilities.{cpp|h}


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17647 a95241bf-73f2-0310-859d-f6bbb57e9c96

Imported ProcessController from BeUnited's CVS into our repository.
Doesn't compile yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17568 a95241bf-73f2-0310-859d-f6bbb57e9c96