Add support for saving custom query

[javajames@…]

Many issue trackers support saving, and sometimes even sharing with other users, your custom queries. This could be something as simple as a new tab in the 'tickets' area of the main nav bar called 'Saved Queries'. This feature is targeted more to the end-user than the administrator, who can currently write SQL to install a new report but must have the appropriate access and familiarity with the underlying DB schema.

A complementary feature might be to wrap a wiki macro to list the saved queries for the current user, thereby allowing the starting wiki page to provide this information on a "Dashboard" of sorts for fast lookups of issues.

[Matthew Good]

See #1338 and #909.

Trac 0.9 will support linking to queries from the Wiki, which means that any user can save queries on the Wiki pages.

[Christian Boos]

See #1735.