LPS-50172 - some areas use the ':selected' pseudo selector without the required 'aui-selector' module

Hi Jon,

Attached is an update for https://issues.liferay.com/browse/LPS-50172.

It's difficult to reproduce this issue without using the custom portlet attached in https://issues.liferay.com/browse/AUI-1382.

I think there is more than one way this issue could be fixed. 

1. use 'aui-base-deprecated' instead of 'aui-base'
2. use the ':checked' selector instead of the ':selected' selector, as they work the same as far as I can tell.
3. include the 'aui-selector' module in addition to 'aui-base'.

I went with number 3, but I'm not completely convinced it is the best solution.

Please let me know your thoughts.

Thanks!