Image Sizes input fields on Media Settings page is too small

[Toru]

On Media Settings page, when viewed on smartphones (or under 784 pixel width), input field for Image Sizes are shorten, and "max-width: 55px" kicks in. When the input value is 3 digits, it is ok, but when 4 digits, 1 digit is not shown. The "max-width: 55px" needs to modified.

Please see captures on Chrome developer tools - iPhone 5, 6, 6 plus.

Media setting on iPhone 5

Media setting on iPhone 6

Media setting on iPhone 6 plus

Change max-width from 55px to 70px

Following the bug scrub on slack today, here comes a refreshed patch.

We have this (only) in

\wp-admin\options-discussion.php
\wp-admin\options-general.php
\wp-admin\options-media.php
\wp-admin\options-reading.php
\wp-admin\options-writing.php

and therefore this should be a non breaking fix (despite the fact that it get's ugly all around when you constrict the browser window to a very small size..)