turn save button read if there is unsafed entries

scam.py

@@ -104,6 +104,8 @@ class MainPanel(wx.Panel):
 
         self.entries = entries = SettingsList(self)
 
+        self.Bind(wx.EVT_TEXT, self.on_change)
+
         self.btn_print = btn_print = wx.Button(self, label="Print")
         self.btn_save = btn_save = wx.Button(self, label="Save")
 
@@ -290,6 +292,15 @@ class MainPanel(wx.Panel):
         pipeline = self.pls[self.instance]
         res = pipeline.set(new_cfg)
         print("result config:", res)
+        self.on_select(None) # get the server-side config again
+        self.btn_save.SetBackgroundColour(wx.NullColour)
+
+
+    def on_change(self, event):
+        old_cfg = self.orig_cfg
+        new_cfg = self.make_cfg()
+        color = wx.Colour(164, 36, 23) if new_cfg != old_cfg else wx.NullColour
+        self.btn_save.SetBackgroundColour(color)