improved the output message when waiting for lock

apm.cpp

@@ -98,7 +98,7 @@ void OperationManager::statusChanged(Akabei::Backend::Status status)
 
         case Akabei::Backend::StatusWaitingForLock: {
             QTextStream out(stdout);
-            out << QObject::tr("Another instance of akabei is currently running. When it finishes, we will continue!") << endl;
+            out << QObject::tr("Acquiring the lock ... (this will wait for other running instances to complete)") << endl;
             break;
         }