Eased "Clear Picture Cache" triggering under Qt

Added a keybinding and added the action to the directories dialog's menu
(it was previously only in the results window's menu). Fixes #230.

qt/pe/app.py

@@ -80,6 +80,9 @@ class DupeGuru(DupeGuruBase):
     def _setup(self):
         self.model.directories.fileclasses = [File]
         DupeGuruBase._setup(self)
+        self.directories_dialog.menuFile.insertAction(
+            self.directories_dialog.actionLoadResults, self.resultWindow.actionClearPictureCache
+        )
     
     def _update_options(self):
         DupeGuruBase._update_options(self)

qt/pe/result_window.py

@@ -17,6 +17,7 @@ class ResultWindow(ResultWindowBase):
     def _setupMenu(self):
         ResultWindowBase._setupMenu(self)
         self.actionClearPictureCache = QAction(tr("Clear Picture Cache"), self)
+        self.actionClearPictureCache.setShortcut('Ctrl+Shift+P')
         self.menuFile.insertAction(self.actionSaveResults, self.actionClearPictureCache)
         self.actionClearPictureCache.triggered.connect(self.clearPictureCacheTriggered)