Custom Ellipsis for grid headers
Merge branch 'AppBarGrid' into UI_Overhaul_GridHeaderEllipsis

Conflicts:
	HudlRT/Views/VideoPlayerView.xaml.cs
Updated logic to determine text block size
Merge branch 'Spheniscidae_Release' into UI_Overhaul_GridHeaderEllipsis
Merge branch 'Spheniscidae_Release' into UI_Overhaul_GridHeaderEllipsis

Conflicts:
	HudlRT/Views/VideoPlayerView.xaml.cs
fixed merge
Merge pull request #141 from hudl/UI_Overhaul_GridHeaderEllipsis

Custom grid header ellipsis