Search Improvements

In a recent discussion it was mentioned that the search function in Lemmy is awkward to use and could be improved. As a result I already made two small changes:

• Change community selector to use [email protected] format (#3218)
• Search field in community sidebar (#3217)

Are there any other UI or UX changes you can think of to improve searching in Lemmy? Im mainly looking for frontend changes, such as reorganizing the input positions, changing default values etc.