Make isLeft() etc. available directly from mouse.js module return value, refs #12451 !strict.   I didn't add the other stuff from mouseButtons because it doesn't seem necessary, but we can add it later if someone needs to access it.
Make isLeft() etc. available directly from mouse.js module return value, refs #12451 !strict.   I didn't add the other stuff from mouseButtons because it doesn't seem necessary, but we can add it later if someone needs to access it.


git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@26063 560b804f-0ae3-0310-86f3-f6aa0a117693

Sam-Cummins/delite,Sam-Cummins/delite,harbalk/delite,kitsonk/delite,kitsonk/delite,harbalk/delite