unmount/remount the BonAppMenu when using DevBonAppPicker

this solves the issue of only changing the cafeId prop, and so the
component has to listen for both initial data and updates

Author: hawkrives

source/views/menus/dev-bonapp-picker.js

@@ -61,6 +61,7 @@ export class BonAppPickerView extends React.PureComponent<Props, State> {
 					<ToolbarButton isActive={true} title="Go" />
 				</Toolbar>
 				<BonAppHostedMenu
+					key={this.state.cafeId}
 					cafeId={this.state.cafeId}
 					loadingMessage={['Loading…']}
 					name="BonApp"