[bug] Fix mod_tags_similar in postgres. Fixes #4846
[fix] Email Regex corrupted when #685 was merged. Fixes #4894
Fix Patchtester link in testing sample data. Closes #4893.

This change the Patchtester link in testing sample data

from: https://github.com/mbabker/patchtester/releases
to https://github.com/joomla-extensions/patchtester/releases
[fix] JFactory::getUser() should always return a user object. Fixes #811
[Code Style] Fix newfeeds modal form field. Closes #4597
[Code Style] Code style for com_content backend. Closes #4559
[Codestyle] Removing some blanks
#4894 / should be escaped as it is a delimiter
[fix] Mail helper is not synced with email validation
correction
Correcting unit tests
correcting comment
Merge pull request #4899 from infograf768/mailhelper

[fix] Mail helper is not synced with email validation
[imp] Text tweaks to bootstrap.php. Fixes #4897

some more changes

some more tweaks
[imp] Making sure Components menu is not case sensitive. Fixes #4889

In one of the previous Joomla! 3 major versions, 3.0, 3.1 or 3.2, I can't remember which, the default ordering for the Components menu was changed to be case sensitive. From that moment, extensions that started with a lowercase letter in their name would be listed at the bottom of the Components menu. This pull request reverts that change back, so the Components menu is truly in alphabetical order again.
[fix] Setting next auto increment value for postgres. Fixes #4408. Fixes #4684
[imp] Adding option to disable mass mail to users option and checks where necessary. Fixes #4490. Fixes #4747

Fixed for Hathor template as well

Turned the option around so that default functionality is Mass Mail enabled

Complying to coding standard

Complying to coding standard (had some spaces instead of tabs

Cleaning some whitespaces
[imp] add defalt values + code styles fixes. #4747
[imp] Do not create the admin menu item if component has no admin files. Fixes #4323

cs

use attribute <menu hidden="true" />
[imp] Add ability to set redirect headers in com_redirect. Fixes #4292

Change language string names

Add extra large class to field

Don't check for empty new url if in advanced mode

Remove not null constraint in db

Remove not null constraint in db (2/2)

Add extra check for a 3xx code

Port to all databases

Add missing update files