Summary

Update the markdown editor Link toolbar control tooltip so it includes the word upload, making file attachment via Link → Upload easier to discover (especially on touch/mobile).

Background

Raised from question issue #2936. Upload already works via Link → Upload (and Image → Upload for images), but the Link control tippy currently only says Link, so the upload path is easy to miss.

Proposed change

In MarkdownEditor.html, change the Link control tippy from Link to wording that includes upload, for example:

• Link / upload

(Exact phrasing can be adjusted for clarity and translation.)

Current behavior

<a t:data-tippy-content="Link" class="do-link">...</a>