message: Fix a stack blow out when a filter in a list picker has zero entries.
diff: @@ -184,12 +184,12 @@ export class PopDownListPicker<T extends { id: string; }> extends ThemeableEleme
  const filteredEntries = this._filterEntries(this._entries, filterInputValue);
  if (filteredEntries.length === 0) {
  - this.selected = null;
  + this._setSelected(null);
  } else {
  const newSelectedIndex = filteredEntries.findIndex( (entry) => entry.id === this.selected);
  const newSelected = filteredEntries[Math.max(0, newSelectedIndex)].id;
  if (newSelected !== this.selected) {
  - this.selected = newSelected;
  + this._setSelected(newSelected);
  }
  }
  