tigefa4u projects Trac

Only warn about WebAdmin if a `webadmin.*` component is actually enabled. Also, uninstalling the plugin is not necessarily a sound advice if a user has admin extensions installed, which will generally (or at least in some cases) continue to work with 0.11.

Added thatch, ecarter and nkantrowitz to the list of authors, for Trac milestone:0.11

Fixed the logic for hiding again the already collapsed folders which are temporarily shown when one of their ancestor gets re-expanded. Not quite sure how I got to the previous flawed code. Closes #5846.

Little improvement for patch renderer when displaying the common root for the diffed files. Closes #5842.

Fix wrong changeset links in revision log RSS feed. Closes #5841.

Remove trailing comma which was causing the IE issue in the reopened #5797

Testing: Merge through 5902 from trunk

Restore 2.3/2.4 compatibility.

Add mime converter support for XSLT as requested in #5392 and tweak XSL mime type definition.

See [comment🎫5392:1]

Improve error message for #5260