* Because these keywords got translated the code can't replace them with values.
* Basicly the idea having these keywords in translation files is just to change the order of them (according to the culture and the region, where another order would be expected).
-> So reverted the translated keywords for german and french.
* Originally taken from my own packaging of Cura on launchpad: ppa:thopiekar/cura - https://launchpad.net/~thopiekar/+archive/ubuntu/cura
* It adds mime-types, which are supported by Cura, to the mime-database, so filemanagers can recognize these files.
* This sharemimeinfo includes currently 3MF, STL and OBJ.
As I upgraded my computer to a developer version of Ubuntu, I noticed that the OpenGL module, which is needed for our workaround, is currently broken.
So I browsed the web and found the reason why it is needed at all and found a alternative.
The reason for the problem is that Qt5 is dynamicly loading libGL.so instead of libGL.so.1, as the OpenGL module loads libGL.so.1.
So if you install the closed-source nvidia drivers it only creates a link from libGL.so.1 to it's binaries and the result is that PyQt5/Qt5 tries to load Mesa binaries together with NVidia binaries.
By importing the OpenGL module you preload the libGL.so.1, but this can also be done directly by using ctypes.
* Replaced the OpenGL fix with the ctypes fix
* Added a TODO
This should be obvious. The thought process was that now we're using the builder instead of making the MeshData object directly, but that has only relevance if you still remember what the old code was.
Contributes to issue CURA-625.
In layer view, the selection shader is now a uniform-color shader. This shader does not use the vertex colours but makes the entire silhouette the same colour.
Contributes to issue CURA-625.
The convex hull mesh was made without adding colours to the vertices. This was probably causing the convex hull to appear red on some machines, if red is the default vertex colour. Using meshbuilder makes code maintenance easier and allows us to easily set the colour of the vertices. Hopefully this fixes the issue with the red convex hulls.
Contributes to issue CURA-625.
