made it a bit more generic; naming

mainwin.py

@@ -57,18 +57,18 @@ class MainWindow(QMainWindow):
 
 
     def on_select_list_item(self, index):
-        key, value = self.lst.get(index)
+        name, desc = self.lst.get(index)
 
         for sub in self.mdi.subWindowList():
-            if sub.windowTitle() == key:
+            if sub.windowTitle() == name:
                 self.mdi.setActiveSubWindow(sub)
                 return
 
-        self.make_new_plot(key, value)
+        self.make_new_plot(name, desc)
 
 
-    def make_new_plot(self, key, value):
-        sub = MDISubPlot(key, value)
+    def make_new_plot(self, *args, **kwargs):
+        sub = MDISubPlot(*args, **kwargs)
         self.mdi.addSubWindow(sub)
         sub.show()