tigefa4u projects Trac

#2647: refactor query.js to use the jQuery `$('<...>')` construction directly.

Well, more or less directly. I also use `$.template` in order to minimize string construction noise. `$.template` was itself made more compact by accepting digit keys for picking ordered arguments in addition to named keys for picking entries in a dict argument (which should be the last argument if given).

0.12dev: Block [8627] from merging.

0.11-stable: Don't try to re-create subdirectories in `trac-admin $ENV deploy`. Thanks to Felix Schwarz for the patch.

Closes #8622.

0.12dev: Merged [8625] from 0.11-stable.

0.11-stable: Don't link to custom queries in the roadmap and in milestones unless the query module is enabled.

Closes #8612.

0.12dev: Made it clearer that the `[[TracGuideToc]]` macro only works for Trac's internal documentation. Thanks to mvaniersel for the patch.

Closes #8671.

0.12dev: Catch all exceptions when loading modules and plugins, and print a complete traceback for "unexpected" ones. Thanks to Felix Schwarz for the patch.

Closes #8667.

0.12dev: Removed the XML processing instruction added in `render_template()` from [8618], as it resulted in a duplicated XML prolog for e.g. RSS feeds.

The default encoding of an XML document, in the absence of a BOM, is UTF-8, so it isn't strictly necessary to add an `encoding="UTF-8"` attribute. If we do want one, we should probably add it to the individual templates.

0.12dev: Added last modification info to wiki pages. Thanks to Sebastian Krysmanski for the initial patch.

Closes #8488.

0.12dev: Prevent [8619] from being merged from 0.11-stable.