Fix packstart having different defaults
Fix VBox references to ContentArea, fix ctrs with ol dialoguestates
Fix dialog ctr
Fix some tooltips
Removing hasSeperator as it no longer exists
Some progressbar progress
Fix State setter
Add Smuxi's GtkExtensions for convenience
Fix TextInsertedArgs API change
Fix startChar being renamed to Start
Fix combobox pre/append text with extensions
Fix Cellrenderer
Resize grips have moved from statusbar to window
Reenable add-ins with the new Mono.Addins.GuiGtk3

Note: The user must have Mono.Addins.GuiGtk3 installed when building on a Unix system!
This is currently pending as a pull request to Mono.Addins... Even when accepted it will
be a while before the new packages filter through.