KeyValueList does not render correctly in FireFox

[maarten-vos]

Description

A keyValueList is being rendered off screen on FireFox v59.0.3 (64-bits)

Browsers Affected

• Chrome
• Firefox
• Edge
• Safari 9
• Safari 8
• IE 11

Versions

• Vidyano: v5.36.0+5338103
• Vidyano Web²: v1.18.0-rc19-f78b81e

[stevehansen]

@inferiormartin @Sleeckx does this still apply?