fix [#33949] T_ALT_TRANSFORM conflicts with "emulate 3 button mouse" 
finally last transform tool relying on alt has an alternative.

Sequencer slide which makes room for the placed strip by moving others - Pressing G a second time toggles this behavior.


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@54553 954f8c5b-7b00-dc11-b283-0030488c597c