Add overlay + please wait spinner on form submit

* Change default sort order to DESC

1) Ability to limit who can post a reply
2) Expanded staff's stats view.

Remove inline onClick/Submit events

Log internal note on mass close/reopen - instead of activity log.
Default to 'SYSTEM' if note poster is not passed.

Make the new ticket form more intuitive (move things around)

Make sure SLA plan is 'active' when marking tickets overdue.

Add SLA to ticket info table.
Move subject to the top of ticket thread.

 - Add To: address
 - Add ability to diable emailed replies
* Post Note
 - Make note title optional.
 - Add additional ticket status (state) options.
* Assign
 - Add claim to dropdown for self-assignments.

here is speak about this 
https://github.com/osTicket/osTicket-1.7/issues/44

Change header to match the new names

Use the new dialog popup to confirm express actions above.
Convert the fileformat to unix

fixing padding on ticket info table and changing mroe button to trigger dropdown on the entire button

Force target selection on filter form
Add minor code improvements

* Change table name from ost_email_filter* to ost_filter*
* Add patch for target field.

* Collapse date settings into system settings.
* Move auto-cron setting to emails settings page.
* Move clickable urls setting to tickets settings page.

This will help distinguish between the knowledgebase part which encompasses
FAQ's and canned responses, and the FAQ part which contains the articles
detailing frequently-asked-questions.