* Add new script for themes menu
* remove icons from the themes menu
* Make theme titles human readable and add spacing at the end
* Migrate to using a link for the new menu generator
* Retain consistent width
But we still do have movement when filtering the menu down to a
shorter-than-longest name. Should try to stabilize that.
* Update all previews to 2K resolution and same dimensions
* Update script to use first bg file if theme preview file doesn't exist
* Add padding to preview box instead of spaces to theme name
* Consistent formatting/indenting
* Prevent height jump
* Revert padding change and remove background color
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Co-authored-by: David Heinemeier Hansson <david@hey.com>