fix some nasty combobox issues
Merge pull request #731 from MahApps/punker76-combobox-issues

fix some nasty combobox issues
own ValidationToolTipTemplate res dict
IsWaitingForData effect only if needed

i don't like this effect because it makes the textbox sometime blurry
(under my system with win 7 ultimate 64 bit)
IsWaitingForData example
flyouts detect theme fallback (main window)

maybe for later, look for application wide theme...
#734 fix blurry textbox with IsWaitingForData
Merge pull request #736 from MahApps/734-punker76-iswaitingfordata-blurry-textbox

#734 fix blurry textbox with IsWaitingForData
remove unnecessary colors
reduce AccentColor usage
re-set accent color brushes too
re-set WindowTitleColorBrush
gray colors
unused colors
re-set HighlightBrush
re-set FlyoutBackgroundBrush
re-set black and white color brushes
re-set brushes for vs style
colors and fonts now in App.xaml
detect app theme for flyouts (last fallback)