* [Mail/Search/Usability] When using Search->Ticket, the results will no longer be restricted to only a worker's own groups.  The group filter is now added by default but it can be removed from the editable filters.  Previously it was a required filter that couldn't be removed.  This has been requested several times by organizations that want workers to see the "Access denied" listing for a ticket when searching by mask or participant, instead of having zero results shown (which leads people to believe they're doing the search wrong).
* [Platform/Popups/Usability] Popups will now float over the same position in the browser even when the rest of the page scrolls.  Previously, popups could be scrolled off the page and become lost.
[Code Cleanup]
* [CHD-3494] [Virtual Attendants/Relay] Fixed an issue where new tickets created by workers from the UI didn't relay their attachments to external worker email addresses.
* [CHD-3616] [Mail/Merge/Usability] Fixed an issue where the merge popup on a ticket profile failed to complete properly if any of the tickets in the chooser had their peek popup opened during the process.
* [CHD-3617] [Mail/Reply] Fixed an issue that occurred when multiple workers attempted to reply to the same ticket within a short time period.  Normally this displays a warning with a 'Continue replying' option, but clicking this button wasn't doing anything.
* [CHD-3444] [Mail/Peek/Usability] Added the relative time to the 'Date:' header on the ticket peek popup.  For example: "Tue, 21 Jan 2014 01:30 am (45 mins ago)".  Previously this only showed the absolute date.
* [CHD-3414] [Mail/Profiles/Masks] Fixed an issue with ticket mask patterns that are purely numeric (e.g. date-based like: 201401220001) which prevented their profiles from displaying.  This had to do with Cerb assuming their masks were internal IDs.  Now masks are always checked first, and IDs are only checked if there's no match.  The performance of this lookup was also improved, because it was previously looking up ticket metadata in two database queries (mask->id, then id->metadata).  A single query (mask->metadata) now retrieves the record in most cases.  For sanity's sake, it is still important that ticket masks don't overlap with IDs, so a date-based mask format would be improved by adding hyphens between the components (e.g. 2014-01-22-0001).
6.5.5-release checkpoint
Merged 6.5.5 into 6.6
* [Mail/Peek/Usability] When viewing the peek popup for a ticket, its group and bucket are now shown as two linked dropdowns.  Changing the group in the first dropdown will change the list of available buckets in the second one.  Previously, the group and bucket were only visible by clicking the dropdown and looking for the (*) marker, which was cumbersome.  Additionally, the previous dropdown also combined groups and buckets into a single long list which was difficult to use.
* [Mail/Compose/Usability] When composing mail, the 'From:' option now displays the group and bucket in two linked dropdowns instead of one big list.
* [Mail/Compose/HTML] Added HTML message support to the compose popup.  The preview feature will display the template for the currently selected group and bucket.
* [Storage/Files] The '/files' page now provides cache control headers for the content it serves.  This allows a workers browser to cache certain resources (like images) after their first retrieval so they aren't requested from the server again.  This is useful now that content like embedded images in HTML messages are displayed through this page.
[Code Cleanup]
* [Platform/Dependencies] Updated HTMLPurifier library from 4.5 to 4.6.
* [Platform/Devblocks/Dependencies] Added the 'CSS to Inline Styles' library by Tijs Verkoyen.  This provides an easy to way to convert CSS STYLE blocks to inline styles when sending HTML email, as many email readers filter out HEAD, BODY, and STYLE.
[Code Cleanup/HTML Templates] Deleting an HTML template will now clear any groups or buckets that reference it.
6.6-dev checkpoint