Added more default elements and changed colours

src/main/java/org/openautonomousconnection/oacswing/component/OACTree.java

@@ -4,7 +4,7 @@
 
 package org.openautonomousconnection.oacswing.component;
 
-import org.jetbrains.annotations.NotNull;
+import lombok.NonNull;
 
 import javax.swing.*;
 import javax.swing.tree.TreeModel;
@@ -55,7 +55,7 @@ public class OACTree extends JTree implements OACComponent {
     }
 
     @Override
-    public void add(@NotNull Component comp, Object constraints) {
+    public void add(@NonNull Component comp, Object constraints) {
         this.initOther(comp);
         super.add(comp, constraints);
     }