I tried to edit some box sizes in WP Admin CSS.
Noticed that #template DIV has a R Margin of 180px in global.css
but theme-editor.css #template TEXTAREA has a width of 96% so I got all excited and tried to change it to 90% thinking I’d leave plenty of room for size changes occurring with a form button hover state.
Nothing worked. It still bops the entire textarea down the page another 100% while keeping the sidebars intact.
This happens on hover over the form submit button and theme select form submit buttons.
Then I commented out all the ‘box sizing’ attributes for input and textarea in global.css – no change.
Tried same thing for WP-admin.css – no joy.
This is a bummer.