tigefa4u projects Trac

Follow-up to r4655, fix displaying of ticket property changes in the Ticket diff view.

Keep the requested rev in the ''From revision'' field, so that the doesn't change when switching the Revision Log Mode. Fixes #2303.

Follow-up to r4788, revert to hard-coded limit when clearing the ''Show at most <limit> revs'' field instead of raising an error.

Shorten line when displaying one-liner wikified message in the revision log view.

TracRevisionLog: add ''Show at most <limit> revisions'' parameter in the preference panel. Closes #4759.

Some minor cleanups in both query and report modules.

Add the possibility to configure the default report, the report which is shown when selecting the ''View Tickets'' main navigation entry.

This shows the default setting:
{{{
[ticket]
default_report = -1
}}}

-1 correspond to the special report listing all the available reports, which means the default setting corresponds to the usual pre-0.11 behavior.

Fixes #1925.

Follow-up to r4714, csv writer is not unicode aware, so we convert the data to UTF-8 encoded strings.

Allow TracQuery to specify result columns, using the `col` parameter. Related to #2821.

Follow-up to r4782, remove some left-over debug statements.