Center text on button

src/frontend/containers/button.js

@@ -33,8 +33,8 @@ class Button extends TiledWidgetContainer {
     ];
     super(form, 'uipack', tileMap, tilesX, tilesY, containerX, containerY, children);
 
-    const text = form.scene.add.text(this.margin, this.margin, button.label);
-    text.setOrigin(0, 0);
+    const text = form.scene.add.text(this.width / 2, this.height / 2, button.label);
+    text.setOrigin(0.5, 0.5);
     this.add(text);
     const buttonOverlay = new RexButton(this, button.config);
     buttonOverlay.on('click', button.callback);