Bug fix #34292

CTRL + MMB zoom in 2d editors now depends on 'max zoom' level. This makes
zooms in UI (very limited) go smoother, but for fcurve or timeline it's same.



git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@54635 954f8c5b-7b00-dc11-b283-0030488c597c