Preventing textbox from overflowing out of container
Preventing textbox from overflowing out of container

When the font is San Francisco, the text input seems to expand out
of the 'download bubble' container because the `min-width: auto`
minimum width value. This seems to take precedence over the flexbox
`flex: 1` style. Giving the textbox a small minimum width allows
the flexbox sizing to take effect.

jstrait/jssynth,jstrait/jssynth