Removing deprecated LESS `.background-size()` mixin calls.
Also
- simplifying code, where second (height) value is automatically set
to `auto` when only one value is set and
- removing stylelint rule.
Bug: T219956
Change-Id: I643c66b3067ba77726d76cbebf7550781e18aa5d
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
This is programmatic output from python3 scripts/migrate.py
This will result in a Minerva skin dependent on MobileFrontend.
Post merge we will rename message keys to have minerva- prefix
Bug: T166748
Change-Id: Iff1f7e63e796cc5d4a6d2ab0370e0c33248d2fce