Removed unused references in WindowsOSUtils project
Moved SetSortIcon() method from WindowsOSUtils project to DotNetUtils project w/ compiler preprocessor check for Mono
Added SuspendDrawing() and ResumeDrawing() extension methods to DotNetUtils/ControlExtensions.cs
Suspend drawing during auto-sizing or columns in ListViewExtensions to prevent flickering
Renamed PlaylistGridControl to PlaylistListView