Fix attempt for wxgtk overzealousness

gui/shipBrowser.py

@@ -556,8 +556,12 @@ class CategoryItem(wx.Window):
         wx.PostEvent(self.shipBrowser,Stage2Selected(categoryID=categoryID))
 
     def enterW(self,event):
-        self.highlighted = 1
-        self.Refresh()
+        mposx,mposy = self.Parent.ScreenToClient(wx.GetMousePosition())
+        iposx,iposy = self.GetPosition()
+        iwidth, iheight = self.GetSize()
+        if mposy >= iposy and mposy<iposy+iheight:
+            self.highlighted = 1
+            self.Refresh()
         event.Skip()
 
     def leaveW(self,event):