first attempt at implementing support for keys with modifiers to use it, the keybinding have to be of the form mod:<modkey>:..:<modkey> <function> <keycode> for instance in an ini file change findhh=h to findhh=mod:lshift h

[patterns]
**.h = native
**.c = native
**.cpp = native
**.lua = native
**.txt = native
**.pas = native
**.inc = native
**.hs = native