Revert "The mainFrame will now close when the last tab is closed"

This reverts commit 6c23b6e2c2.

gui/chromeTabs.py

@@ -188,9 +188,6 @@ class PFNotebook(wx.Panel):
         else:
             self.activePage = None
 
-        # The last Page got deleted
-        if len(self.pages) == 0:
-            wx.GetApp().GetTopWindow().Close()
 
     def SwitchPages(self, src, dest, internal = False):
         self.pages[src], self.pages[dest] = self.pages[dest], self.pages[src]