Honor system date format on custom date fields

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

Ensure pre made articles shipped are html

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

Continue drafts after a reset

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

Make findRichtextBoxes() more reusable

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

Implement custom validation error

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

Slight fixup for dialogs

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

Add tables new to 1.8 to the exporter

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

Fixes #64

Previously, deleting a draft either from a form [reset] button or from the
trashcan would delete the draft and cancel the draft system for the
remainder of the page's lifetime. This patch deletes the current draft and
resets the Redactor's content, but then it starts a new draft cycle so
drafts can be continued. It also prevents posting to an undefined URL if the
draft_id has not yet been setup.

Fixes #90

Fixes #65

Fixes #78

  * Dialogs are scrollable if too big
  * Placement does not respect scroll position now (fixed position)

Fixes #80

Changes up to v1.7.3 released

Conflicts:
	WHATSNEW.md
	css/osticket.css
	scp/css/scp.css

Fixes #834 (again)

Allow embedding videos via <iframes>

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

If the HTML ticket thread is enabled and the message is not explicitly
declared to be text, then assume it is an HTML message.

Also ensure that the ticket thread is displayed in a <div> container as some
browsers seems to frown upon <iframe>s in <td> elements

Fixes #75

Await draft deletion before refreshing the page 

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

Fix oops in upgrade of %help_topic table

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

Fix oops in htmLawd callback for HTML cleanup

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

Fixup templates to work with Redactor in line break mode

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

If the [reset] button refreshes the page, ensure the draft deletion is
completed before the refresh is performed or the draft deletion will be
canceled.

formset_id was not renamed to form_id after our rebase

Fix parsing issue in strtotime()

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

PHP can't discern the difference between d/m/Y and m/d/Y when just the date
is submitted to strtotime(). Unfortunately, strptime() is not available
until PHP 5.1.0. This patch forces datepickers to change their values to
YYYY-MM-DD upon submission to disambiguate parsing issues.

Fixes #832

Remove placeholder text if found in the draft save

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

And freshen up the upgrading guide

The issue has been filed with Imperavi, but no ticket number or other
tracking information was returned.

Also, if any non-shipped .htaccess files exist, don't clean those either

Fixes #60