non-static GraphicsCapabilities

Each GraphicsDevice have it's own instance of GraphicsCapabilities. On
the desktop it's possible to have multiple GraphicsDevice created with
different Feature Levels or even using Reference/WARP devices.
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openGL
openGL2
GLES
text formatting...
openGL3_ANDROID
Merge remote-tracking branch 'upstream/develop' into tnc_GraphicsCapabilities
Merge pull request #2841 from nkast/tnc_GraphicsCapabilities

non-static GraphicsCapabilities