update timing adjusted

deregister as observer moved into teardown functions.

check index against num_strip, num_bus in level updates

patch bump

vmcompact/config.py

@@ -71,7 +71,7 @@ class Config(ttk.Frame):
     def on_update(self, subject):
         """update parameters"""
         if subject == "pdirty":
-            self.after(_base_values.pdelay, self.sync)
+            self.sync()
 
 
 class StripConfig(Config):