This along with other misc fixes by listening to the validation layers
"fixes" specular, but just for the skin. I need to do some more work to
figure out why it doesn't work for character shaders yet.
Also introduces new helper functions to Device to easily transition
textures and name them.
This takes the existing properties widget in the new material editor and
makes it reusable across multiple applications. It's now added to the
Armoury which shows the gear's used materials. It's also added to the
Data Explorer which now supports viewing material files.
I fixed the render viewport crashing when hiding it again, and made it
even more resilient.
At least on my machine, the AMD Windows Vulkan driver is way more strict
compared to Linux.
* The correct device features are now enabled.
* Image usage flags for offscreen textures are corrected.
This now splits up the rendering system into sensible parts, and makes
it easier to switch between the simple renderer and the new experimental
one. Lots of refactors I needed to do for a while are now done, too.
