Exit Watch Recordings if user aborts the initial Rec Group popup.

If the user ESCapes out of the initial Recording Group popup on
the Watch Recordings screen, exit the screen rather than leaving
the user with a blank list.  This restores pre-MythUI functionality.

Refs #9210.

mythtv/programs/mythfrontend/playbackbox.cpp

@@ -4336,12 +4336,21 @@ void PlaybackBox::showGroupFilter(void)
     {
         connect(recGroupPopup, SIGNAL(result(QString)),
                 SLOT(displayRecGroup(QString)));
+        connect(recGroupPopup, SIGNAL(Exiting()),
+                SLOT(groupSelectorClosed()));
         m_popupStack->AddScreen(recGroupPopup);
     }
     else
         delete recGroupPopup;
 }
 
+void PlaybackBox::groupSelectorClosed(void)
+{
+    if ((gCoreContext->GetNumSetting("QueryInitialFilter", 0) == 1) &&
+        ((m_titleList.size() <= 1)))
+        Close();
+}
+
 void PlaybackBox::setGroupFilter(const QString &recGroup)
 {
     QString newRecGroup = recGroup;

mythtv/programs/mythfrontend/playbackbox.h

@@ -134,6 +134,7 @@ class PlaybackBox : public ScheduleCommon
 
   public slots:
     void displayRecGroup(const QString &newRecGroup = "");
+    void groupSelectorClosed(void);
 
   protected slots:
     void updateRecList(MythUIButtonListItem *);