Fix invalid test to check if the video mode change has no effect.
The layers are not rendered with a ratio that would make their content smaller than the screen.
Fix the position of the label in the buttons with no icons.

The label appeared with twice the margin on the left. Now the margin is applied
to the label only if the icon has a non zero width.
Merge branch 'master' of github.com:j-jorge/bear into android-render-thread

Conflicts:
	bear-engine/core/src/visual/code/gl_screen.cpp