Left+right clicking should expand like middle click

[namdrib]

Left+right clicking should expand like middle click

[Namdrib]

First normal left click buggy - doesn't do anything

[Namdrib]

Note: After chording, treat all mouse buttons as not being pressed. e.g. left click down -> full cycle right -> treat as left and right back up

[Namdrib]

Bug: the game currently doesn't remember the state of mouse clicks/presses between CellIcons.
e.g. In the following image, right-mouse-down at (1) then (while right mouse still down) left-mouse-down at (2) doesn't correctly trigger a chording action at position (2).