Always show same size tags for Tag Cloud in WordPress Admin

I wanted to know if there was a way to modify the back-end of WordPress to do 2 things:

• Make all tags’ font the same size, so none are larger than the others
• Always show the most used tags when creating/editing a post

This only applies to the back-end of WordPress, not calling the tag cloud or any sort of front-end CSS that would be found in the theme.

use this at functions.php

    /* Tagcloud, change the font size */
function custom_tag_cloud_widget($args) {
    $args['largest'] = 13; //largest tag
    $args['smallest'] = 13; //smallest tag
    $args['unit'] = 'px'; //tag font unit
    return $args;
}
add_filter( 'widget_tag_cloud_args', 'custom_tag_cloud_widget' );