Fix $app connection in Register Method

Register method failed to get a copy of the Application for all uses.
Missing required second argument in array_diff

The $whiteListAttributes variable is missing on the comparison function. 
This pr corrects previous https://github.com/joomla/joomla-cms/pull/2575
Test using assertXmlStringEqualsXmlString instead of simple string comparison
Remove unnecessary php behavior check.
  [#32130] com_search Warning: mb_strpos() problems
Fixing batchAccess
Resetting the location as well when table is resetted.
 # [#31682] Options for ordering in config.xml of com_tags is wrong
Thanks Phương Lê
(Fix #1694)
Typo
Merge pull request #2632 from Bakual/FixCategoryBatchCopy

Fix category batch copy. Thanks
Merge pull request #2630 from infograf768/32130

  [#32130] com_search Warning: mb_strpos() problems
Reverting not allowing spaces inside username
Merge pull request #2643 from infograf768/32883-master

Allow spaces
Revert "Merge pull request #2643 from infograf768/32883-master"

This reverts commit a01e4706117373f4e9c68e6e33f58e2cec3b9d26, reversing
changes made to 21161aa95829c8abb11646ebbb9e537a2bfdaf12.
Reverting not allowing spaces in username
$ Adding back Czech installation lang files
Preventing saving spaces at beginning and end of username for Superadmin
when installing Joomla
Clean up some webdriver tests to hopefully fix intermittent problems.
Merge pull request #2646 from infograf768/32883-new

# Reverting not allowing spaces in username
[#29791] Space inside extension manifest <updateservers> / server> xml
node caused unclear / confusing error message