Wake the screen at print start and end (#229)

* Wake the screen at print start and end

* job_status: Wake screen on re-print

Co-authored-by: Jordan <jordan.ruthe@gmail.com>

screen.py

@@ -528,6 +528,10 @@ class KlipperScreen(Gtk.Window):
             self._menu_go_back()
         return True
 
+    def wake_screen(self):
+        # Wake the screen (it will go to standby as configured)
+        os.system("xset -display :0 dpms force on")
+
     def set_screenblanking_timeout(self, time):
         # Disable screen blanking
         os.system("xset -display :0 s off")