Enable retraction by default on the 4 simple profiles.
Up the default support material amount to 80%
Enhance SD card message.
Merge branch 'master' into SteamEngine

Conflicts:
	Cura/util/profile.py
Have the shader editor refresh the load animation on change.
Some code cleanup, and move the load dialog to the scene view.
Force the window on screen.
Merge branch 'master' into SteamEngine