Display recent searches in search screen instead of saved POIs

Description

This replaces the unorganized list of favorites with a sorted list of recently selected POIs.

A maximum of 20 items is stored.

These recents can be deleted with the "close" icon button on the right side of the search result card. In the future we may choose to add an incognito mode or complete history deletion or something like that.

Screenshots

Issues

Fixes #2 (closed)