fix build without systemd

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
keybinder: move all gdk_x11 in keybinding

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
keybinder: remove useless symbols

Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>