reverted changes

openlp/core/ui/mainwindow.py

@@ -785,7 +785,6 @@ class MainWindow(QtGui.QMainWindow, Ui_MainWindow):
         Receiver.send_message(u'cursor_busy')
         self.image_manager.update_display()
         self.renderer.update_display()
-        self.themeManagerContents.updatePreviewImages()
         self.previewController.screenSizeChanged()
         self.liveController.screenSizeChanged()
         self.setFocus()

openlp/core/ui/thememanager.py

@@ -660,15 +660,6 @@ class ThemeManager(QtGui.QWidget):
         pixmap.save(thumb, u'png')
         log.debug(u'Theme image written to %s', samplepathname)
 
-    def updatePreviewImages(self):
-        """
-        Called to update the themes' preview images.
-        """
-        for theme in self.themelist:
-            self.generateAndSaveImage(
-                self.path, theme, self.getThemeData(theme))
-        self.loadThemes()
-
     def generateImage(self, themeData, forcePage=False):
         """
         Call the renderer to build a Sample Image