#28, fix font and size of MenuItem, StatusBarMenuItem and RibbonTabItem.
#28, fix font and size of BackstageToggleButton.
Merge remote-tracking branch 'fluentribbon/master'
#28, let ribbon controls inherit SystemsFont.Menu* from RibbonWindow.
Merge remote-tracking branch 'fluentribbon/master'
#28, fix size of StatusBar.
#28, TitleBarHeight now will be based on SystemsFont.MenuFont*.
#28, please ignore, remove unnecessary changes.
#28, TitleBar font now based on SystemFonts.CaptionFont*. And fix the scope of font settings.
Merge pull request #31 from innostory/master

System wide font settings.