Changed version back to 1.2.13dev

This reverts commit e78c311c5121dd05a031d01ce9769f32a37dba0c.
Fix SQL error in summary page on PostgreSQL

This is a regression introduced by the fix for issue #11928 (see commit
0c9dc2a877f21900a39931dbbc29661a5aee79bf) which was not detected before
as it was tested on MySQL which has more permissive SQL syntax.

Fixes #15201
Fix #14871: Add support for the built-in soap extension in addition to
nusoap
Fix and improve timezone verification in admin checks

admin/check.php now properly detects issues with timezone settings, in
line with behavior of date_default_timezone_get() in PHP >= 5.3 and
provides better information to the admin in case of errors.

It also fixes an issue with PHP 5.1, by only calling function
timezone_identifiers_list() when it actually exists, and returns a
warning that it is unable to check timezone if it does not. Thanks to
Tim Jackson for detecting and providing the initial patch for this bug.

Fixes #14009
Documentation: added $g_default_timezone to admin guide

Fixes #11854
SOAP API: make the first parameter of mci_soap_fault_access_denied
optional

Fixes #14871: Add support for the built-in soap extension in addition to
nusoap
SOAP API: add failing test for retrieving issue text in non-latin charsets

Affects #14157: Array to string conversion error on soap request with
PHP 5.4
Fix replacing of invalid XML characters

Fixes #14157: Array to string conversion error on soap request with PHP
5.4
Localisation updates from http://translatewiki.net.
SOAP API: only reference the global default category if it exists

Fixes #15222: mc_project_delete_category fails to delete category
soap api: fall back to the default_category_for_moves when deleting
categories

Fixes #15222: mc_project_delete_category fails to delete category
Fix #15199: Update json api error format
Localisation updates from http://translatewiki.net.
Don't send notif mail when updating Protected account's Access Level

Prior to this, Mantis would effectively not update the protected user
account's 'Access Level' field, but would still send a notification to
the user informing them that the field was modified, causing confusion.

The confirmation message for protected account update was reworded.

Fixes #15247
Reworded PHPdoc email_send_all() function description
Make email_send_all() send older queued messages first

To achieve this, a new optional parameter was added to function
email_queue_get_ids() to specify the desired sort order (defaults to
'DESC' to ensure no change in behavior).

email_send_all() now retrieves the list of emails to send in ascending
order.

Fixes #15248
Remove unnecessary assignment

Commit 361089d2a2f8b85e178de315046916ea26836e92 omitted to remove the
old default value for $g_set_status_threshold.
Localisation updates from http://translatewiki.net.
Enable filter date fields by default when $g_use_javascript = OFF

With javascript disabled, when ticking 'use date filters' checkbox in
view issues page, the associated selection fields to pick the date
criteria remain disabled, preventing date filtering.

The code now detects the state of $g_use_javascript and sets the
'disabled' state of the date selection fields accordingly.

Also removes 'Undefined variables' system notices.

Fixes #15255
Fix inconsistent use of numeric vs text month in date filter

The selection list now uses full-text months consistently across the
filter page

Fixes #15257