Merge pull request #89 from manuelroemer/develop

Added po:Freeze to Accent Brushes.

Created new CornerRadius globals.

Updated style folder structure.

There is no application object in UnitTests. :(

Incremented Version in preparation for the next release.

Merge pull request #88 from manuelroemer/theme-support

Fixed the Dark AvalonEdit.

Made the two Theme Dictionaries consistent again.

Made the ControlGallery's XAML Display support dark mode.

Commented the ThemeResourceDictionary.

Fixed now invalid Static Resources.

Removed unnecessary resource dictionary merges.

Fixed a few controls.

Added ChromeWhite Brush.