applets/weather: Add a history of recent locations

This helps the user to quickly select previoulsy used locations instead of searching, which is helpful when frequently travelling between the same places.

The location history is stored in the applet's global config so it is shared between the different weather applets.

The recent locations are shown when we are not searching, and are replaced by the search results when searching, which I find very convenient.

But I'm wondering if some kind of label "Recent locations:" should be necessary, and how to display it, as it would interfere with the search field (@teams/vdg)