Reference language translation cut off on some screen sizes

[Ellpeck]

Describe the bug
On some screen sizes, seemingly especially on mobile, the text in the reference language field is cut off with no visual indication of it being hidden (like a scroll bar or ellipses).

Selecting the field and navigating around it using the arrow keys makes the rest of the text visible.

To Reproduce
Steps to reproduce the behavior:

1. Go to a translation with very long text
2. Set the reference language to a translated one
3. See error

Expected behavior
The box should automatically have the correct size to be able to display all of the text, or a scroll bar should appear next to the text box.

Screenshots

Environment (please complete the following information):

• Device: Desktop
• OS: Windows 10
• Browser: Chrome
• Version: 0.19.1