add icon for recent files menu

raven/mainwindow.py

@@ -80,6 +80,7 @@ class MainWindow(QMainWindow):
                     menu.addAction(action)
                 if menu_contribution.menu:
                     submenu = QMenu(self.tr(menu_contribution.menu.label), menu_bar)
+                    submenu.setIcon(QIcon.fromTheme(menu_contribution.menu.icon_from_theme))
                     menu_contribution.menu.add_change_listener(
                         lambda qmenu=submenu, rmenu=menu_contribution.menu: self._rmenu_update(qmenu, rmenu))
                     self._rmenu_update(submenu, menu_contribution.menu)

raven/plugins/domain/rmenu.py

@@ -4,11 +4,12 @@ from raven.plugins.domain.raction import RAction
 
 
 class RMenu():
-    def __init__(self, label: str):
+    def __init__(self, label: str, icon_from_theme: str = ""):
         super(RMenu, self).__init__()
         self.label = label
         self.actions = []
         self.listeners = []
+        self.icon_from_theme = icon_from_theme;
 
     def add_action(self, action: RAction):
         self.actions.append(action)

raven/plugins/openfileplugin.py

@@ -30,7 +30,7 @@ class OpenFilePlugin(PluginBase):
         return open_file
 
     def _sub_menu_recent_files(self) -> RMenu:
-        self._menu_recent_files = RMenu("Open &Recent")
+        self._menu_recent_files = RMenu("Open &Recent", icon_from_theme="document-open-recent")
         self._update_recent_files_menu()
         return self._menu_recent_files