Code Style Fixes!
Merge branch 'staging' into auth_update
Merge pull request #2767 from puneet0191/staging

Code Style Fixes, Selenium System Tests
[#] Fix spinner not appearing while installing language

This old change make it to stop working: https://github.com/joomla/joomla-cms/commit/08658c34cbc45db8e578277a468517a756e2846d
Fix code style: move spaces to tabs in all JS function
Merge pull request #2774 from javigomez/fix_spinner_in_language

[#] Fix spinner not appearing while installing language
For Info: the issue could be reproduced in Firefox on Windows XP. Merging.
Update joomla.sql

Fix default value for the parameter guest_usergroup. This fix could be treated as security fix - if site has wrong value for the guest usergroup (13) and site already has the usergroup with such ID with administrator permissions - all of them would be administrators.
Update joomla.sql

Fix incorrect default value for guest_usergroup for PostgreSQL
Update joomla.sql

Fix incorrect default value for guest_usergroup for SQL Server
[#32687] JPath::clean: $path is not a string - regression
[#33105] vaildate email broken for IDN domains
Merge pull request #2788 from infograf768/33105

[#33105] validate email broken for IDN domains
Query-fix in com_content article modal

This change prevents the query from being executed when the value is 0. There is never an article with ID 0 and especially when there are more than one modal select per page, you have several unnecessary queries.
Merge pull request #2763 from infograf768/33075

 [#33075] mod_breadcrumbs shows "You are here" as tooltip instead of text
Two factor authentication on front-end

When two factor authentication is enabled and in all plugins it is set to use it only in back-end then in front-end secret key field should be hidden in users component as in login module.
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_id=8103&tracker_item_id=33153
Update view.html.php
Add support for checking minimum PHP version in XML update stream

This introduces a <php_minimum> tag which should indicate the minimum supported PHP version of an extension
Optimize version_compare check, thanks @dongilbert
[33095] Improving multilanguage status errors
small correction