MP6: buttons.css is incorrectly overriding wp-admin.css

[johnbillion]

MP6 in plugin form enqueues its stylesheets after core's buttons.css. MP6's styles have now been merged into wp-admin.css which is loaded before buttons.css. This means some responsive button styles in wp-admin.css are not being applied as they should be.

Example: the "Apply" button at the bottom of post listing screens does not get its extra padding applied on the <782px media query.

Also the "Default" button in the Iris color picker does not get any extra padding in this media query because there's no extra padding given to .button-small.

[iammattthomas]

MP6 responsive button styles need to be moved from wp-admin.css to buttons.css.

[melchoyce]

Took a first stab at migrating button styles over from wp-admin.css to buttons.css. Currently, this only moves over styles that include ".button". I'd appreciate another set of eyes to make sure I migrated the right styles and didn't miss anything that should have been moved over.

[melchoyce]

Also — my patch doesn't tackle this:

Also the "Default" button in the Iris color picker does not get any extra padding in this media query because there's no extra padding given to .button-small.

[iammattthomas]

In 26386:

Move responsive button styles from wp-admin.css to buttons.css. Fixes #25968, props melchoyce.