Use local imports instead given all relevant files are within the
same repository, and don't vary by configuraion.
Bug: T140807
Depends-On: If3edac9a35b346af0320c12f70c0d978a6346201
Change-Id: Ife3cc345a63aff452e93accbe0a593fbaa358732
The preferences page is accessible if a user opts into the Minerva
desktop experience. It's not a great first experience.
These changes make the page usable.
* Provide styling for tabs
* Provide padding/borders for unstyled button elements
Change-Id: I107ed3c685910a5e9502b25d22ef7cc489ce3c34