Task-number: QTCREATORBUG-333

 * Add -color option to core plugin which will override
   the base UI color for that session.

Reviewed-by: thorbjorn

 * Change layout of project mode page.

Reviewed-By: dt

 * Rename it to IPropertiesPanel in accordance with new naming standards.
 * Do not derive from Context. That is not needed.
 * Add an icon() method.
 * Fix all usages of this interface.

Reviewed-By: dt

As side effect we can now play a bit with visualizing extra selections

 * Panel struct does no longer take ownership of its widget.
 * Panels consitently delete their widget in their destructor.

Reviewed-By: dt

 * This way it becomes available to all classes in this file.

Reviewed-By: dt

Extract the common root directory and display in separate
line. Use the routine from
the cvs plugin for that, moving it to stringutils.h.

Reviewed-By: Christian Kamm <christian.d.kamm@nokia.com>

Task-number:  QTCREATORBUG-333

Mac OS X >= Leopard only.
Task-number: QTCREATORBUG-356

Task-number: QTCREATORBUG-339

Add a title label to the pages. Use QGroupBoxes throughout.
Extend SavedAction to work with checkable QGroupBoxes. Polish UI files,
use common layout for VCS plugins. Performance: Apply only visited
settings pages. Add search keywords.

Task-number: QTCREATOR-26

Task-number: QTCREATOR-26

To reproduce:
Split editors.
Select text in first editor.
Select text in second editor.
Invoke the find dialog.
Notice that the text from the first editor was used.

Reviewed-By: mae
(cherry picked from commit fd0fbdde)

It can be a bit disturbing if the list suddenly jumps when you don't
release the down or up key in time.

Done with mae.