fix: workspace shifts when deleting a block (#8666)

* fix: workspace shifts when deleting a block

* fix: awaiting for block rerender

* fix: create reusable method to prevent marking method as async

Author: mateusslezinsky

core/dragging/block_drag_strategy.ts

@@ -384,19 +384,24 @@ export class BlockDragStrategy implements IDragStrategy {
     if (this.connectionCandidate) {
       // Applying connections also rerenders the relevant blocks.
       this.applyConnections(this.connectionCandidate);
+      this.disposeStep();
     } else {
-      this.block.queueRender();
+      this.block.queueRender().then(() => this.disposeStep());
     }
+
+    if (!this.inGroup) {
+      eventUtils.setGroup(false);
+    }
+  }
+
+  /** Disposes of any state at the end of the drag. */
+  private disposeStep() {
     this.block.snapToGrid();
 
     // Must dispose after connections are applied to not break the dynamic
     // connections plugin. See #7859
     this.connectionPreviewer!.dispose();
     this.workspace.setResizesEnabled(true);
-
-    if (!this.inGroup) {
-      eventUtils.setGroup(false);
-    }
   }
 
   /** Connects the given candidate connections. */