kiosk-shell: Don't use a modifier for surface activation bindings

The mouse button and touch bindings to activate a surface shouldn't
use the binding modifier.

Fixes: https://gitlab.freedesktop.org/wayland/weston/-/issues/679

Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>
(cherry picked from commit 723709aa073fb740c3443fae8e370306d0738675)

kiosk-shell/kiosk-shell.c

@@ -1069,13 +1069,13 @@ kiosk_shell_add_bindings(struct kiosk_shell *shell)
 
 	mod = weston_shell_get_binding_modifier(shell->config, MODIFIER_SUPER);
 
-	weston_compositor_add_button_binding(shell->compositor, BTN_LEFT, mod,
+	weston_compositor_add_button_binding(shell->compositor, BTN_LEFT, 0,
 					     kiosk_shell_click_to_activate_binding,
 					     shell);
-	weston_compositor_add_button_binding(shell->compositor, BTN_RIGHT, mod,
+	weston_compositor_add_button_binding(shell->compositor, BTN_RIGHT, 0,
 					     kiosk_shell_click_to_activate_binding,
 					     shell);
-	weston_compositor_add_touch_binding(shell->compositor, mod,
+	weston_compositor_add_touch_binding(shell->compositor, 0,
 					    kiosk_shell_touch_to_activate_binding,
 					    shell);