Actions for thread entries

Reviewed-By: Peter Rotich <peter@osticket.com>

Make role permissions dynamic

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

  * Fix fatal errors adding a new FAQ (fixes #1648)
  * Fix removal of attachments when deleting a thread (fixes #1650)
  * Fix crash discovering department members for alerts (fixes #1652)

  * Fix translation of pages
  * Localize client thank-you page on new ticket
  * Fix adding new category
  * Fix crash on staff login when upgrading from < 1.9
  * Don't show self locks on ticket queue pages

Key permissions definition array
Move canned and faq permissions to their respective classes.

This allows agents to view the raw email headers parsed with the email when
the ticket or thread entry was created.

Allow for permissions to be registered dynamically. This will
allow for the ability for models and plugins to register permissions.

Handle missing `intl` module
Handle crash translating the staff login banner, when the %translation table
    does not yet exist
Handle `allow_client_updates` never having been configured
Handle staff login without @lang and @extra attributes in database

Add role to initial admin's profile
Add default timezone

Support duplicate names in different hierarchy
Save path on add/update
Show full department name on transfer

This will look through the database and find images which appear to be
inlined in thread entries, but are not recorded as inline. It will update
the %ticket_attachment table to reflect the inline disposition of the
images.

Introduce Tasks

Add ability to add tasks to tickets.

Introduce the initial concept of adding tasks to a ticket.

Add generic routing to get object's dynamic form entries.

Introduce the concept of tasks. Tasks are to do list that can be attached to
any object e.g Ticket.

Thread-able objects (e.g Ticket) can extend the class to add object specific
util routines.

Auto-close toop tip box when element goes away

Generalize how we show object/data preview. The url to get the preview is
now based on data-preview attribute on the element in question.

The size of the dialog can be auto-adjusted based on the options

Add support for complex options to support complex field rendering.

Validate all fields with data even if it's for presentation only

Use generic attachment table for all attachments system-wide.
Drop thread entry attachment table