Improve default sort order of platforms

Problem/Motivation

Currently, when you install the module the sort order of platforms seems to be somewhat random. Currently I have Pinterest, TikTok, Drupal, Twitter, YouTube Channel, Vimeo, SlideShare and so on. The most common platforms my clients use (Facebook, Twitter, Instagram, YouTube, LinkedIn) are buried down the list. It's annoying to have to hunt down the list for the ones I need then drag them all the way to the top so I can order them the way the client wants them.

Proposed resolution

These should be sorted such that more common platforms are at the top so people don't have to go hunting for them.

Better yet, since the list is now quite long, change the widget such that users can add a platforms one-by-one instead of just showing a big list to start out with. See attached wireframe as a suggestion. There would also need to be a way to remove platforms already added to the list.