See downstream https://phabricator.wikimedia.org/T171648. The T123 Task Name column in graphs can currently fold down to 0 pixels wide.
Although it's visually nice to render this element without a scroll bar when we don't really need one, the current behavior is excessive and not very useful.
Instead, tweak the CSS so:
- This cell is always at least 320px wide.
- After 320px, we'll overflow/ellipsis the cell on small screens.
This generally gives us better behavior:
- Small screens get a scrollbar to see a reasonable amount of content.
- The UI doesn't turn into a total mess if one task has a whole novel of text.