Added Disabled VisualState for SwitchToggleButton
started on notes for next release
whitespace fixup for one file
fix FocusVisualStyle and KeyboardNavigation

- set FocusVisualStyle for Flyout to Null
- set KeyboardNavigation.TabNavigation for Flyout ItemControl to None
Issue #345 top/bottom flyouts
Allow for restoring window size when window is maximized and the title bar is hidden.
Removed accent border when unchecked

When unchecked there was always a little bit of the accent border visible, when the element was unchecked, so I added a margin when the element is unchecked.

Also I made the disabled state, better to tell apart from enabled state.
fix groupbox margin Issue #399
Merge pull request #407 from punker76/master

fix groupbox margin Issue #399
Merge pull request #406 from stefan-schweiger/patch-1

ToggleSwitchButton: Removed accent border when unchecked
merge branch master