Create a DolphinApplication, holding DolphinMainWindows and update
the code to use the DolphinView to get the MainWindow, or get a ptr
to the MainWindow directly. Or if all windows are effected go through
the DolphinApplication to update every mainwindow.
The UndowManager and ProgressIndicator have a rather strange relationship
and will need some more attention but as UndoManager will be killed
anyway I have skipped this.
More cleanup, debugging and thinking is needed.
svn path=/trunk/playground/utils/dolphin/; revision=608945
