Support "warm" reloading of designer (without full Unload/Load in view content). Happens automatically on language change -> removed own PropertyValueChanged handler.
Fixed the designer not reloading after a load error on the primary file.
Show a "please wait" label while loading.
Moved DefaultMemberRelationshipService to its own file.
Removed unused TypeDescriptorFilterService (that service is in the framework already).
Simplified IDEContainer and do actually add the grid to the container.
git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@3508 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61