Request: Clear data of apps in custom lists.

With 2.2.5, selecting the option to `Clean cache of custom list` does not allow clearing of data, despite having the `Allow clear data` option enabled. My suggestion is to--instead of directly starting the cleanup procedure--show the list of apps in the selected custom list, just like with the other `Clean cache of [...]` options. That way the user can review what's in the custom list, and might as well hit the red button if enabled.