Fixed Windows close-tab bug (I think); refactored

This commit SHOULD fix Ctrl-W/menu-bar closing on Windows; also, the code was refactored into a new multiSwitch method

gui/mainFrame.py

@@ -114,12 +114,9 @@ class MainFrame(wx.Frame):
         tab, _ = self.notebookBrowsers.HitTest(event.Position)
         if tab != -1:
             self.notebookBrowsers.SetSelection(tab)
-            
+    
     def CloseCurrentFit(self, evt):
-        self.fitMultiSwitch.removeTab(self.fitMultiSwitch.GetSelection())
-        #Deleting a tab might have put us on the "+" tab, make sure we don't stay there
-        if self.fitMultiSwitch.GetSelection() == self.fitMultiSwitch.GetPageCount() - 1:
-            self.fitMultiSwitch.SetSelection(self.fitMultiSwitch.GetPageCount() - 2)
+        self.fitMultiSwitch.removeCurrentTab()
 
     def ExitApp(self, evt):
         try:

gui/multiSwitch.py

@@ -104,6 +104,14 @@ class MultiSwitch(wx.Notebook):
 
             self.removal = False
 
+    def removeCurrentTab(self):
+        self.removal = True
+        self.removeTab(self.GetSelection())
+        #Deleting a tab might have put us on the "+" tab, make sure we don't stay there
+        if self.GetSelection() == self.GetPageCount() - 1:
+            self.SetSelection(self.GetPageCount() - 2)
+        self.removal = False
+
     def checkAdd(self, event):
         if event.Selection == self.GetPageCount() - 1:
             if "__WXMSW__" not in wx.PlatformInfo: