Inspector improvements & Viewport buffer visualization

[FacoBackup]

Viewport buffers

• Add name to each and every sampler
• Register the buffer onto a map (use for disposing and for listing samplers)
• Render buffer on a small image in the bottom corner (like foliage/terrain mask)

Inspector

• Single list of FieldDTO instead of per inspection
• Search for groups and fields
• Unify all repositories on the engine side into the ´EngineRepository´