Make the default Drawable constructor use non-multithreaded semantics, consistent with desktop platforms.
Make Drawable inherit from Container + implementation for Windows, Mac and Wpf. A stub implementation for Gtk.
Make Drawable inherit from Container + implementation for iOS.
Make Drawable inherit from Container: Fix for Winforms PixelLayoutHandler.
Tab control test: added Add Tab button.
Winforms clipboard: extend logic for retrieving images.
iOS: Remove unneeded configurations in project files (only Debug/Release configs are needed for libraries)
Gtk: Don't draw face of clock in DateTimePicker drop down - a) slow, b) looks better without
Add Color.Blend static method to blend two colors using alpha component
Dock layout should set the parent layout of old control to null when switching content
Move CreateGraphics to Drawable. from corliss/dev
Added null check.
iOS Build fixes
Enable iOS UITimerHandler.
Graphics.MeasureString: Add a check for null strings and return Size.Empty. (Platforms such as iOS and Mac throw exceptions for empty strings.)
Null check.
Fix namespace.
iOS/Wpf: Drawable.CreateGraphics is no supported
Gtk: Drawable can now be a container
Wpf: Drawable should allow setting a transparent background color