* Mermaid diagrams: basic syntax highlight (not all diagram types are supported) and code folding.
* Slight organization in Appearance settings: code block themes are now in "Text Notes", added a "Related settings" section in Appearance.
* [Added support for opening and activating a note in a new tab using Ctrl+Shift+click on notes in the launcher pane, note tree, or note images](https://github.com/TriliumNext/Notes/pull/1854) by @SiriusXT