updated template for MetroContentControl based on feedback from @ipjohnson
Recreated part of an older PR but for detecting the theme instead.
Updated thememanager again.
tweaking MetroWindow layout to ensure text ellipses are respected
updated demo layout
Removed static properties and detection of a theme from app resources.
Fixed the data-context and progresscolour binding issue. Fixes #626
Update MetroTabItem.cs

added a new constructor for the issue #555
only style formatting
fix background for MetroCircleButtonStyle
add MetroCircleButtonFocusVisual

fix also IsMouseOver and IsPressed for MetroCircleButtonStyle and
MetroCircleToggleButtonStyle (should only be triggered if mouse is over
ellipse)
fix foreground theme usage
use BorderThickness as StrokeThickness
remove unnecessary border from focu visual style
fade out effect on IsPressed
fade out effect MetroCircleToggleButtonStyle

 too
Merge pull request #672 from MahApps/punker76-MetroCircleButtonStyle-issues

fix some metro circle button style issues
style formatting
respect font size (#471)
adapts Calendar button symbol to textbox height