This method makes it easy to send a HTML mail based on the default text
mails. This is probably enough for simpler mails where no sophisticated
HTML is needed except a bit of formatting and linked URLs.

it now passes the whole Mail object and also signals if the mail sending
was successful to the AFTER event. A bunch of references should make it
compatible with old plugins.

this should make it easier to reintroduce a plugin hook compatible with
the old one

fixed resizing mediamanager panels in Chrome using browser sniffing (FS#2351) - any better solution welcome

Changes to plugins cascade for FS#2359

renamed plugins.protected.php to plugins.required.php and added it cascade to allow overwriting as a local protected file

pt: paraphrased '<' character in some language files to avoid XML errors

as per commit 34bc7405

paraphrased '<' character in some language files (en, de, de-informal) to avoid XML errors -- please fix other languages

re-added font-size to .ui-widget of jqueryui theme to make programmatical removing of font-family easier

fix widths of panels in fullscreen mediamanager to be 100% when resizing (FS#2351) -- please test in different screen sizes, etc

It's still not real world tested but the output *looks* right.

Plugin hook support is still missing.

This fixes password changing operations: password change and user
modification are two different operations on the AD backend - the user
modification should not be done on password only changes.