Use MapView.contentInset in Search component to better visualize results.

[mhdostal]

The search component will zoom to the extent of search results (after displaying the results as graphics in the MapView), but results will often be hidden by the search result list. Use the MapView.contentInset property to only display the results in the visible area of the MapView.

• use the .contentInset modifier of MapView
• only works with MapView; SceneView has no .contentInset modifier
• pass a binding to the contentInset to the SearchView
• the SearchView should set the contentInset, based on the area not covered by the result list and "repeat search here" button