Apply suggestions from code review

will anyone read this? Bli bla blub. I can write anything here and no one will notice. Bwuhahaha.

Co-authored-by: CyB3RC0nN0R <kske@outlook.de>

client/src/main/java/envoy/client/ui/Startup.java

@@ -81,6 +81,7 @@ public final class Startup extends Application {
 			System.exit(1);
 			return;
 		}
+
 		// Prepare handshake
 		localDB.loadIDGenerator();
 		context.setLocalDB(localDB);

client/src/main/java/envoy/client/ui/controller/Tabs.java

@@ -25,5 +25,5 @@ public enum Tabs {
 	/**
 	 * Selects the {@code group creation} tab.
 	 */
-	GROUP_CREATION;
+	GROUP_CREATION
 }