This addresses an issue where class Queue sets SavedSearches flags to
`FLAG_QUEUE` causing the SavedSearches to become Primary Queues.

This commit addresses an issue where saved searches were not being ported to
SavedQueues on 1.10.x upgrade to 1.11.x

Make subjects bold (by default) when ticket is unanswered

Add ticket reopen count as a column annotation

Addresses issue with agent/assignee sorting

- On ticket edit, only display inactive help topic warning if the ticket has a help topic
- Inline edit file save fix
- Remove future search/filter criteria for datetime fields that can't be in the future
- Fix calculations for 'next 7 days' and 'next 30 days'. They were selecting dates between now and n days AGO instead of between now and n days in the future

COALESCE sort fields when a column has multiple data sources.

This commits adds ability for agents to configure public queues.

* Customize Columns
* Set default sort & quick filter
* Add supplemental filters (criteria)

To support above features this commit also addresses confusing Advanced
Search UI to make it intuitive when dealing with a Saved Queue vs. Saved
Search vs. Adhoc Search

Only ignore visibility constraints on private "searches" when staff is allowed to search the backend.
Access control is strictly imposed on ALL queues including inherited private sub-queues.

Commit 5be0de0d introduced the idea of moving-up old saved searches to make
room for Custom Queues but failed to account for cases where the system
has more than 30 saved searches.

This commit addresses the issue by just re-inserting the old records after
queues are imported. It also adds validates & reformat the search criteria
to make the expected format.

This commit addresses a few lint related issue - notable one is ignoring
undefined methods within source code comments.

* Make saving advanced ticket search intuitive
* Make save separate operation from search (primary)
* Show inherited criteria on parent queue change

Add ability to select fields / columns to export for queues, including adhoc
searches.

* Export all exportable fields by default - for all queues + adhoc searches
* Export Due Date as well as SLA Due Date

Add ability to add sticky export fields for queues.

This allows a queue to define conditions which apply to the entire row, so
that all the columns in a row can react to a particular condition. For
instance, rows in the ticket queue for tickets due in the near future or
assigned to a particular team could be formatted a certain way.

Adds the ability to "Clone" a queue, which would be nice to create a queue
similar to the current one with a couple distinct settings, but also not a
child of the queue. Also adds the ability to add a "Sub Queue" to the current
queue, which will allow easy creation of queues which are pre-configured for
inheritance.

This adds the ability to add a list of avatars to a column in a ticket
queue.

Also, fix queue paths created at installation time.

Also fix SQL issue with the tables installed in the install script

This patch implements Nathan's mockups for adding sorting options to the
custom queues. The sort drop-down feature was added for v1.10. This patch
adds the complex sort dropdown back into the custom queue feature, but also
makes the sorting options customizable.

And provide a foundation for sorting on other complex field types

Also, avoid setting FLAG_INHERIT_COLUMNS for queues which do not inherit
from another queue.