Clean up the command handling loop

The try blocks now only protect the code they need to, which is a Good
Thing™.

kayleevc/kaylee.py

 
         # Give the command to the handlers that want it
         while True:
+            # Get information about the handler
             try:
-                # Get information about the handler
                 info = confidence_heap.get_nowait()
-                handler = info[0]
-                plugin = info[2]
-                # Handle the command
-                handler(self.plugin_tts)
-                self._log_history(plugin, text)
-                break
             except queue.Empty:
+                # If the queue is empty, we have nothing else to try, so break
                 break
+            handler = info[0]
+            plugin = info[2]
+
+            # Handle the command
+            try:
+                handler(self.plugin_tts)
             except kayleevc.plugins.HandlerFailure:
                 # If the handler failed, keep trying
                 continue
+            else:
+                # If the handler succeeded, log it and break
+                self._log_history(plugin, text)
+                break
 
         self._stop_ui(text)