tigefa4u projects Trac

Searching on multiple keywords from different table columns didn't work, closes #2129.

Follow-up to [2384]: don't show max-file-size error when the file hasn't actually exceeded the max file size. Fixes #1921.

Fix display of error message when a HTML preview for a file is not available. Closes #1921. Probably a regression introduced in [2276].

Allow checkbox custom ticket fields to be used in custom queries. Fixes #2166.
Also, removed hacks for Safari; those bugs appear to be fixed in Safari 1.3/2.0.

Cleanup for the TracBrowser navigation links:
* ''Revision Log'' link from the browser page will use the specified
revision, if there is one. This should fix #2239.
* ''View Latest Revision'' link from the revision log page will ''not''
use the specified ''start'' revision, but instead will go to the
youngest revision. That's more intuitive and anyway it's still possible
to browse the ''start'' revision by following the browse rev link found
in the first row.

Allow viewing the full file contents in the changeset view, by entering "all" in the context lines field (or in fact any string that is either not a number or a negative number). Closes #927.

Refactoring: moved milestone model class into `trac.ticket.model`, and the roadmap/milestone web interface into `trac.ticket.roadmap`.

A few minor cleanups for the DatabaseBackend refactoring

Make it easier to remove the availability of the ''Ticket details'' event filter in the TracTimeline.

By default, it is disabled, but it can be restored by using a new config entry in TracIni:
{{{
[timeline]
ticket_details = yes
}}}

Also, even if the feature is enabled, the filter itself will be inactive by default
(i.e. the ''Ticket details'' check box is left unchecked; the user can of course
decide to use it).

In a future release, the `trac.ticket.UpdateDetailsForTimeline`
will be merged with the base ticket event provider, so don't
rely on the presence of that component to enable/disable the feature.

Fixes #1895.

Improve compatibility of the Roadmap iCalendar format with Outlook. Fixes #1988. Thanks to markus for the patch.