Add touch controls for mobile support

src/ui/ui.ts

@@ -280,6 +280,9 @@ export default class UI extends Phaser.GameObjects.Container {
           if (chainMode && this.mode && !clear)
             this.modeChain.push(this.mode);
           this.mode = mode;
+          const touchControls = document.getElementById('touchControls');
+          if (touchControls)
+            touchControls.dataset.uiMode = Mode[mode];
           this.getHandler().show(args);
         }
         resolve();