Fix belt planner placing down once a dialog pops up

src/js/game/hud/parts/building_placer_logic.js

@@ -253,6 +253,12 @@ export class HUDBuildingPlacerLogic extends BaseHUDPart {
      * @see BaseHUDPart.update
      */
     update() {
+        // Abort placement if a dialog was shown in the meantime
+        if (this.root.hud.hasBlockingOverlayOpen()) {
+            this.abortPlacement();
+            return;
+        }
+
         // Always update since the camera might have moved
         const mousePos = this.root.app.mousePosition;
         if (mousePos) {