Do not allow to open more than 1 ammo pickers

gui/auxFrame.py

@@ -53,14 +53,18 @@ class AuxiliaryFrame(wx.Frame):
             self.SetBackgroundColour(wx.SystemSettings.GetColour(wx.SYS_COLOUR_BTNFACE))
 
     @classmethod
-    def openOne(cls, parent, *args, **kwargs):
+    def openOne(cls, parent, *args, forceReopen=False, **kwargs):
         """If window is open and alive - raise it, open otherwise"""
-        if not cls._instance:
+        if not cls._instance or forceReopen:
+            if cls._instance:
+                cls._instance.Close()
             frame = cls(parent, *args, **kwargs)
             cls._instance = frame
             frame.Show()
         else:
             cls._instance.Raise()
+        return cls._instance
+
 
     def OnSuppressedAction(self, event):
         return

gui/builtinContextMenus/graphFitAmmoPicker.py

@@ -26,8 +26,7 @@ class GraphFitAmmoPicker(ContextMenuSingle):
         return 'Plot with Different Ammo...'
 
     def activate(self, callingWindow, fullContext, mainItem, i):
-        window = AmmoPickerFrame(callingWindow, mainItem.item)
-        window.Show()
+        AmmoPickerFrame.openOne(callingWindow, mainItem.item, forceReopen=True)
 
 
 GraphFitAmmoPicker.register()