Fix input box widths in calibration UI

[vvuk]

Description

A number of the input fields in the calibration panels are too small to show
the entire value, especially with the units. This PR takes into account
the size of the units and increases the width of the boxes. It's especially
an issue in the retraction test because the Step unit is very wide, and
then even worse on a high DPI display on Linux.

There's an additional issue that the dialogs are resizable but the panel
doesn't scale with the window, but that doesn't impact usability.

Screenshots/Recordings/Graphs

(Will attach shortly)

Tests

Opened all the panels.

[SoftFever]

Thank you.
A few screenshots will be really helpful.

[vvuk]

Whoops sorry, completely forgot. Here's the before and after for one of the dialogs, the others are the same. Note that in all cases the inner content doesn't scale up with the window either if the dialog window is resized (I resized the window manually in the "before" screenshot, but didn't do it in the "after"). I was going to fix that as well, but it's less of an issue.

before:

after:

[SoftFever]

LGTM
Thank you