Plugin-Move

Introduced place mode to move plugin. Translation manipulators now can be placed and replaced on a mesh surface.
If in move selection mode, the placing will be supported by an automatic snapping feature (depending on which kind of
selection is active: vertex, edge or face selection). A proper icon will be commited soon.

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@7036 383ad7c9-94d9-4d36-a494-682f7c89f535