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- Rename all ui_*.hh includes to ui_*.h

   This removes a lot of qt gl collisions
   Developers have to include the scenegraph headers if they use the corresponding nodes

https://www.graphics.rwth-aachen.de:9000/OpenFlipper-Free/OpenFlipper-Free/issues/150
by initializing the colorStack also when the pickCache is used, as the
picking renderer reinitializes the colorstack.

refs #141

refs #141

not support it.

acquiring a wrong opengl context

also added the actually reported values to the options widget to detect
driver issues. llvmpipe software rendering supports 3.3 core profiles
and openflipper can be run with llvmpipe

samples. E.G. use -glVersion 3.2 -samples 4

to utf8

changeset was broken for other OSes. use featureGlewSeparation instead

This reverts commit 9b30bc3b, reversing
changes made to 29aa322e.

wrapper function signature

 Avoids include clashes by bad include order, by causing an error
* fixed bad inclusion order

profile

when breaking on glerror

Fix accidental switch fallthrough.

cf OpenFlipper-Free#139