Image/file description field can't be resized when rows is set to 1

[Toutouwai]

Short description of the issue

InputfieldFile and InputfieldImage use a textarea input for the description field unless the "Number of rows for description field?" is set to 1, in which case they use a text input.

This results in a less useful input as it can't be resized in the case that the user wants to enter a longer description and the text input doesn't seem to offer any advantages over a single-row textarea.

Setup/Environment

• ProcessWire version: 3.0.241