use .IsSet() instead if .Get() != NULL

Change-Id: Ia2b7a719fd398e78cc3b11d4f7b02cb81179f65f
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3488
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

HaikuDepot: Multiple improvements for user-ratings

* Display of the user-ratings listing improved
* When a user-rating is created / edited, the pkg is updated
* Creation date of the user-rating is unpacked shown
* Ability to create a user-rating with a comment, but no numerical rating
* Stars display show grey if no numerical rating present
* Improvements to error reporting when problem arise
* Parsing of the 'revision' field of the version working
* Removed debug logging for the text engine
* Other minor tweaks

Change-Id: I99f881ab1426641ef4177eec2d3bcacc7cb74e95

Text framework: Added TextEditor::Replace()

Call Replace() on TextDocument, so that there are not two edits later
on once UndoableEdit stuff is supported.

HaikuDepot: Clean up trailing whitespace.

HaikuDepot: React to B_SELECT_ALL in custom text view

Renamed HaikuDepot's home to haikudepot.

* This closes #10699. I mentioned that to stippi after his first commit
of HaikuDepot, anyway :-)

Text framework: Added TextEditor::Replace()

Call Replace() on TextDocument, so that there are not two edits later
on once UndoableEdit stuff is supported.

HaikuDepot: Clean up trailing whitespace.

HaikuDepot: React to B_SELECT_ALL in custom text view

Renamed HaikuDepot's home to haikudepot.

* This closes #10699. I mentioned that to stippi after his first commit
of HaikuDepot, anyway :-)