Description

Long section headings overlap with the toc icon when viewing on mobile devices (rework branch).

Expected behavior

The icon should not overlap the text, text should break over two lines in this case.

Actual behavior

The text is overlapped by the icon.

Steps to reproduce the bug

1. Create a page with multiple headings
2. Add that page to mkdocs.yml with a long title
3. Resize the browser to emulate a device
4. Click on the menu and observe the overlap.