xF2 Add-on AndyB Change date 2.8

Change date v2.8 changes:

Latest activity is now updated.

Change date v2.7 changes:

Now updateds forum_view last post date column.

Change date v2.6 changes:

Now compatible with XF 2.0, XF 2.1 and XF 2.2.

Change date v2.5 changes:

Updated change date overlay to show date selector first.

Change date v2.4 changes:

Now using XenForo functions for performing database updates.

Fixed issue with changing first post in a thread. Now properly updates the position of the post.

Change date v2.0 changes:

Fixed search index variable.