Forms UWP: Poor map & basemap list performance when native debugging is enabled

[nCastle1]

Due to a Xamarin.Forms bug, performance while displaying the basemap and user map lists is very noticeably poor while debugging. This only happens when native debugging is disabled.

To work around the issue, disable native/mixed debugging in project properties -> Debug.

This issue can be closed when Xamarin fixes the bug in a future release.