Adding items to an empty container did not result in a [+] in front of
the container in the locals view.

Instead of just flipping same-length strings.
Also fix an incorrect replace position adjustment.

We need to port the code to use the new overloay system.

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