create the shutdown panel, add it to the action bar, remove items from system panel

shutdown maintain estop during printing
add option to shudown both host and printer close #1207
simplify host and printer dialog if ks is local, do both

ks_includes/screen_panel.py

@@ -43,6 +43,7 @@ class ScreenPanel:
                                               "printer.emergency_stop")
         else:
             self._screen._ws.klippy.emergency_stop()
+        self._screen._ws.klippy.emergency_stop()
 
     def get_file_image(self, filename, width=None, height=None, small=False):
         if not self._files.has_thumbnail(filename):