* Make sure TitleBar takes into account the AOT mode change
* remove namespaces in cpp files
* code linting
* use macro for IsAlwaysOnTop and make IsAlwaysOnTop/DisplayNormalAlwaysOnTopOption read-only
* Fix FontWeight
Move back the VisualStateManager node to the root XAML element to fix visual states of the titlebar.
### How changes were validated:
- Manually
Fixes#631
Fixes#407 (partially) and #441
Description of the changes:
Remove TitleBarHelper and all <Border x:Name="CustomTitleBar" />
Let the system defines the draggable region
Centralize all events and functions associated to the title bar in a single control TitleBar instead of code splitted between MainPage/TitleBar/HistoryList/Memory.
Use the standard title bar when high contrast is activated instead of the custom one.
Modify the color of the title when the window doesn't have focus
Fix the right padding of the title bar with high contrast
How changes were validated:
Manually tested with LtR and RtL languages
Manually tested with high contrast
Tested when History and Memory flyout are opened
