Open Collection Editor from PropertyGrid for Properties which implement ICollection
(Resources, Children, Items, ...)
Color & TimeSpan Editor in PropertyGrid
uses Controls from Extended WPF Toolkit fork (https://github.com/jogibear9988/WpfExToolkit)
A few small fixes for the XamlDesigner Sample App:

- fix the AvalonDock default Settings so no exception is raised
- Allow the Designed WPF View to be Tested or Rendered to a Bitmap
- Better Assembly Resolving
WPF Toolkit DLL missed for Color & TimeSpan Editor
Select Items below the current by Pressing Alt Key when Clicking on Control!
cancel XAML completion in attribute values, if '{' is pressed and we are in an empty attribute value
fix #452: XAML CC inserts ", " in unexpected places when typing nested markup extension
fix unit tests
Fix C# syntax highlighting: more than 3 slashes do not start a doc comment.
Use ToolNotFoundProjectLoadException in WixProject.CheckWixIsInstalled()
When replacing the whole document, ensure the deleted lines have IsDeleted set to true.
Add public void Run (Stream stream) and public void Run (string fileName,bool show) to Pdf/PdfExporter.cs
Fix #447: Revert to old indent engine

Re-opens #109 and #144.
Fix #450: FormatItem completion and partial completion
Make use of RichText.CreateRuns()
Fix #445: Debug console crash when evaluating some types of expressions in a generic context
Fix escaping of char literals in debugger output.
Fix #455: C# CaretReferenceHighlighter highlights incorrect offsets before it is being refreshed
Fix #377: Underlines are a little off when created by background syntax check and after compilation
fix #441: Profiler crashes
SharpDevelop cannot profile a DLL without a host executable