loading state for search component

[marcoow]

Currently, when showing the search component for the search term, the component shows the message "we could not find locations" initially before showing the actual data after that has been loaded. We need to show a loading state instead and only show the message if no data was found.

I think the best solution is probably to load all data in the parent PPMClient component and only pass the current state (e.g. in this case loading/loaded with data/loaded with no data) to the Search and Location child components.