Allow ordering/editing of categories

# The problem:
When I want to open a particular settings option, for example **Settings -> Display**, I can't see the option I'm looking for unless I scroll down or additionally type in 'settings'. This is because the 'Application Actions' appear before settings.

This may be an extreme example because the Insomnia application has quite a lot of actions, and they have long descriptions so they're likely to match many different searches.

# Feature request / potential solution:
There may be many other ways\* to solve this, but what would work for me would be the option to choose the order in which categories appear in the launcher. E.g. if you use the launcher mostly for launching apps & settings, you could have them appear first, with application actions appearing further down the list.
Alternatively the option to remove particular actions or actions for particular apps would be helpful.

\*I like the choice to have sound settings available in the sound menu, for example—now I don't have to search for sound settings in the launcher