[ticket/11452] Now notification_method_email checks whether user has address.

Make sure the user has an email address set before offering email
notifications. The address could be missing for whatever reason, e.g. external
authentication. This is also consistent with XMPP/Jabber now.

PHPBB3-11452
[ticket/10741] Function to resize textarea elements

New function to automatically resize textarea elements
as user types text

PHPBB3-10741
[ticket/10741] Automatically resize textareas in prosilver and ACP

Automatically resize textareas in prosilver and ACP.

PHPBB3-10741
[ticket/10741] Do not resize textarea.no-auto-resize

Do not auto-resize textareas with class .no-auto-resize

PHPBB3-10741
[ticket/10741] Fix for browser-specific resizing of textarea

Disable browser-specific resizing only after textarea has been resized
Enable browser-specific resizing after script resizing has been reset

PHPBB3-10741
[ticket/10741] Docblock for phpbb.resizeTextArea

Better description of phpBB.resizeTextArea with detailed
explanation of all optional parameters.

Removed unnecessary semicolons

PHPBB3-10741
Merge remote-tracking branch 'remotes/cyberalien/ticket/10741' into develop
Merge remote-tracking branch 'remotes/bantu/ticket/11452' into develop