#504428 follow-up by keith.smith: Remove 'now' from all empty admin screen texts. Steve Krug would be proud.

#495956 by andypost, cafuego, fiasco: Convert initial queries in system_install() to DBTNG to stop weird inconsistencies on various platforms.

#460706 by wulff and c960657: Don't show surrounding fieldset on user registration form when only one profile category exists.

#482346 by Berdir: Move module installation logic to module_enable() to prevent errors upon enabling modules.

#333171 by catch: Provide cache_get_multiple() and allow clearing of multiple cache IDs at once (with tests).

- Patch #503996 by kika, Sutharsan: changed label from 'Expanded' to 'Show as expanded' for better usability.

Roll-back of #503982 which caused test failures. One day, I will learn that not even a *one word* patch is immune from causing test failures.