Merge branch 'feature/#165_Rest-API-New' into feature/#178_heimatIntegration

Author: Death111

src/main/java/de/doubleslash/keeptime/App.java

@@ -286,7 +286,7 @@ private void registerMaximizeEventlistener(final Scene mainScene, final Stage pr
 
    @Override
    public void stop() throws Exception {
-      springContext.stop();
+      springContext.close();
    }
 
 }