Reuse the slidecontroller actions on the display window to enable

shortcuts to work for the display window. Fixes bug #286.

openlp/core/ui/mainwindow.py

@@ -1003,8 +1003,9 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow, LogMixin, RegistryPropert
         """
         self.application.set_busy_cursor()
         self.image_manager.update_display()
-        # self.renderer.update_display()
+        self.renderer.resize(self.live_controller.screens.current.display_geometry.size())
         self.preview_controller.screen_size_changed()
+        self.live_controller.setup_displays()
         self.live_controller.screen_size_changed()
         self.setFocus()
         self.activateWindow()

openlp/core/ui/slidecontroller.py

@@ -175,6 +175,8 @@ class SlideController(QtWidgets.QWidget, LogMixin, RegistryProperties):
             if screen.is_display:
                 display = DisplayWindow(self, screen)
                 self.displays.append(display)
+        if self.display:
+            self.__add_actions_to_widget(self.display)
 
     @property
     def display(self):
@@ -639,9 +641,6 @@ class SlideController(QtWidgets.QWidget, LogMixin, RegistryProperties):
         if self.is_live and self.displays:
             for display in self.displays:
                 display.resize(self.screens.current.display_geometry.size())
-        # if self.is_live:
-        #     self.__add_actions_to_widget(self.display)
-        # The SlidePreview's ratio.
 
     def __add_actions_to_widget(self, widget):
         """