[gnome-software] (9 commits) ...Merge branch '135-restart-and-install-update-button-does-not-trigger-reboot-when-using-lxde' into 'm

[Philip Withnall <pwithnall src gnome org>]

Summary of changes:

  d35b515... gs-common: Add a finish() function for gs_utils_invoke_rebo (*)
  8f5ed83... gs-application: Use new gs_utils_invoke_reboot_finish() (*)
  2714d90... gs-updates-page: Use gs_utils_invoke_reboot_async() to requ (*)
  27153ef... gs-updates-section: Use gs_utils_invoke_reboot_async() to r (*)
  5ec14f9... gs-common: Use GTask internally in gs_utils_invoke_reboot_a (*)
  06ae6db... gs-common: Prefix error in gs_utils_invoke_reboot_async() (*)
  f00f9d9... gs-common: Try different methods when invoking reboot (*)
  84b6087... gs-common: Replace g_bus_get_sync() with its async variants (*)
  d0c80f2... Merge branch '135-restart-and-install-update-button-does-no

(*) This commit already existed in another branch; no separate mail sent