This make EditProfileDialog and RenameTabsDialog reuse the same
widget, instead of duplicating each other in its own code or .ui file.
RenameTabsDialog is now just a simple container of RenameTabWidget
This reduces:
* The duplicated code for setting up that push button
* The duplicate entries in ui files for the Text and ToolTip
Note: there are still quite some duplicate between RenameTabsDialog and
EditProfileDialog. Maybe it is good idea to create a customized widget
EditTabTitleWidget to reduce the duplicate
Jekyll Wu
Kurt Hindenburg