Partial fix for #35108: Shortcuts 3dsmax Blender 2.67RC

Made keyap use the same select_or_deselect_all operator
as used for maya keymap instead of tricks with deselect_all.

Solves issue with selection in editor mode (reported as #3
in the original bug report).

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@56407 954f8c5b-7b00-dc11-b283-0030488c597c