Attachment settings are now exclusively handled by the settings on the
ThreadEntry field on the ticket details form. Enabling attachments as well
as tuning attachment validation settings are all handled from the one place
now.

Only one file is supported at a time now; but at least the files are saved
and displayed in the event of validation errors.

This will allow for more complex widgets to be added as plugins which
include css and javascript media files without manually adding header or
footer lines.

Add translation context to ticket states

Reviewed-By: Jared Hancock <jared@osticket.com>

Add context to ticket state name (noun) and action (verbs)

Conflicts:

	include/class.forms.php

And allow for @context to add context to the bare string literal. For
instance,

    /* @trans, @context "noun" */ 'Open'

Would mark the string 'Open' translatable with context "noun".

Ticket status change

Reviewed-By: Jared Hancock <jared@osticket.com>

Add statuses and flags selection to advanced search

Reviewed-By: Jared Hancock <jared@osticket.com>

Fix search backend to use the new statuses