shell: modifier bindings configurable

This patch makes the main modifier configurable.  We used to hardcode super
(windows key) for most bindings, but now that can be changed.

The change affects two key bindings: rotation moves to mod+right click
and backlight moves to from ctrl+f9/f10 to mod+f9/f10.

Signed-off-by: Tiago Vignatti <tiago.vignatti@intel.com>
2 files changed