[TASK] Remove table usage in "User settings" + base on Twbs

The module "User settings" currently uses tables to style the form.
This must be changed to use a proper markup.

Additionally fixed:
 * Typos
 * Strict comparison where nothing breaks for sure.

Resolves: #62328
Releases: master
Change-Id: I6af386b63cca6d2ca35eb169332f5e36f7d03542
Reviewed-on: http://review.typo3.org/33393
Reviewed-by: Felix Kopp <felix-source@phorax.com>
Tested-by: Felix Kopp <felix-source@phorax.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>