MB-12165: custom background color for disabled inputs

Change-Id: Ib3c7225479a9c754cb4ecb40dd6df94208657350
Reviewed-on: http://review.couchbase.org/42686
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Merge branch 'rel-3.0.1'

* rel-3.0.1:
  MB-12165: custom background color for disabled inputs

This is trivial merge.

Change-Id: Idbcdeb4e0dc27b9a06cbd7c30242233d4fed76c9