I have(as most people) a context menu button in the middle of Ctrl and Win, at right side of keyboard. It must to do one simple this - replace right mouse button.
At now, context menu of Sublime have no special things, but it can get it in future. But! This button don't works in Sublime. In others - works perfectly.
If it can help, here button info from xev:
state 0x10, keycode 135 (keysym 0xff67, Menu)