overhang rgb=(200,0,0),remove supportType,do not save para after overhang operation preview
Change-Id: I947bbd9db264f00f0609b3f02140060f9a2621fb
(cherry picked from commit 796c4460fe998da206f9ca77973a20796fa1d3ca)
1. set the unprintable volume to black even if it is mmu painted
2. add the bounding check logic when the object is partly inside of current plate
Change-Id: I69ce25eb85a71398ed8fb1d275136c5d943796d6