Make Mouse Operations Configurable

[n3bulous]

Referencing #2 where @contentfree and I bring up alt-click collisions with the column selection plugin

ctags and column selection are both extremely useful, but mouse actions don't appear to be configurable on Atom's keybindings preference page.

[n3bulous]

You rock! That was unbelievably quick. It was actually keeping me from using Atom on a regular basis. Thank you!

[contentfree]

Doesn't seem to work. I tried making it alt+right-click (on OSX). After restarting Atom, alt+right-clicking just shows the normal right-click context menu. Additionally, attempting to use ctrl+left-click results in the same (context menu is shown).

[yongkangchen]

@contentfree did not support right-click on OS X.
I guess atom editor show context menu and stop the mouse event propagation.
Please use left-click on OS X instead.