tigefa4u projects Trac

Resource-based permission checking added to the workflow code (plugins).

Minor fix to Image macro that did not accept `'px'` ending on width argument as documentation indicated. Now it supports both.

Make date input parsing more robust, as it turns out that converting back from timestamp later may lead to error if the date is outside a valid range (depending on platform) - usually larger than sometime in 2038.

Fixes #5322.

Fixing the order of some admin enums when modified through web-admin or trac-admin. Deleting a value left holes in the order, and made some strange ranges over time. Passes tests, and added some more to test the reordering.

As far as I can see, it is the name of the option (like 'defect') that is stored everywhere, with the order value is only used for display. Hope this assumption holds :-)

Closes #2876.

TracPlugins @45 integrated - some text on troubleshooting for plugin loading.

Sync to trunk.

Sync up to r6288

Sync up to r6285.

Make sure this is really the same as on trunk.

Updated references to three Trac 'common' resources that did not use `chrome.htdocs_location` like the rest.

Closes #6471.