Refactor usage of BorderThickness, ResizeBorderThickness and GlassBorderThickness

[batzen]

Currently BorderThickness, ResizeBorderThickness and GlassBorderThickness are used inconsistently.

First step will be a rename from GlassBorderThickness to GlassFrameThickness to make it clear that it does not control a Border but the GlassFrame instead.

After that the usage of ResizeBorderThickness should be removed, except for controlling the WindowChromeBehavior.

The parts of RibbonWindow which currently use ResizeBorderThickness should be changed to use BorderThickness (or something else) instead.

Because we are currently using this in a wrong way the Office 2010 and Window 8 themes look kind of awkward on Windows 10 currently.