[Bug] failure to detect keybinds with shift

[migueldeoleiros]

Keybinds that contain shift as a mod don't seem to work as expected, you can bind combinations like:

 {mod = ["mod4", "shift"], key = "f1", cmd = "command"}

But you can't bind combinations that include regular keys like "1", "a" etc.
I suspect this could be related with capitalization, it's likely that the compositor expects a lower case key and instead it gets the mods plus an uppercase key.