message: Collect drag and drop events before anyone else can see them
diff: @@ -108,10 +108,10 @@ export class SnapDropContainer extends ThemeableElementBase {
  const topDiv = DomUtils.getShadowId(this, ID_TOP);
  topDiv.classList.add(CLASS_NOT_DRAGGING);
  - topDiv.addEventListener("dragenter", this._handleDragEnter.bind(this));
  - topDiv.addEventListener("dragover", this._handleDragOver.bind(this));
  - topDiv.addEventListener("dragleave", this._handleDragLeave.bind(this));
  - topDiv.addEventListener("drop", this._handleDrop.bind(this));
  + topDiv.addEventListener("dragenter", this._handleDragEnter.bind(this), true);
  + topDiv.addEventListener("dragover", this._handleDragOver.bind(this), true);
  + topDiv.addEventListener("dragleave", this._handleDragLeave.bind(this), true);
  + topDiv.addEventListener("drop", this._handleDrop.bind(this), true);
  }
  private createClone() {
  