Make certain entity properties read only.

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>
Move initial brush 16 units lower.
Change initial camera position.
Initially focus the map view.

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>
Fix MapGLCanvas focus issues.
Set MRU texture when selecting a face.
Hide rotation decorators when entity rendering or bounds rendering is disabled.

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>