Event description box sometimes grows larger than necessary while typing

[brundonsmith]

The event description field (<Input multiline> component) is intended to grow to fit the number of lines in its content, as the user types

Someone showed me that, on their phone, when they typed into the event description field, it would grow twice as much as it needed to in order to accommodate new lines. This caused it to have a bunch of extra whitespace and push down the rest of the UI. This may not be happening on all browsers/OSes, so some investigation may be needed to reproduce the issue