This restores the previously reverted patchset
If5b76245bf60bfa9cf977cdbf37ee0d6bb65f9d9

Changes since original:
* Added Depends-On to MobileFrontend
* Uses OOUI classes for page issues rather than es6 classes - ES6
classes do not support modifications to class prior to running
super so MobileFrontend's View class is not compatible without
significant refactors.

Depends-On: I24ad75adf8519102ca356d64d99d765ab69180cc
Bug: T348807
Change-Id: I4ff82af0251254c846f2caee330af5af738f6029