Issue #1798732 by Dean Reilly, westie, alexpott, sun: convert install_task() variable to use state system.

Issue #1812034 by xjm: Only use standard profile where necessary in comment.module tests (10% bot speed-up).

Dang it. I effed up commit credit. Reverting to I can re-commit again.
Post-push git commit --amend support on d.o would be so lovely.

This reverts commit 722432c3.

Issue #1787846 by Gábor Hojtsy, EclipseGc, effulgentsia, fubhy: Added Themes should declare their layouts.