Un-wait a waiting task when done

Implements #2322

src/commands/CmdDone.cpp

@@ -94,6 +94,10 @@ int CmdDone::execute (std::string&)
           task.addAnnotation (Context::getContext ().config.get ("journal.time.stop.annotation"));
       }
 
+      // Un-wait the task, if waiting.
+      if (task.has ("wait"))
+        task.remove ("wait");
+
       if (permission (taskDifferences (before, task) + question, filtered.size ()))
       {
         updateRecurrenceMask (task);