DX spots improvement ideas

[SO9W]

Hi.

Below ideas that could make using DX spots usage more comfortable.

1) add phone/data/cw checkboxes to filter DX spots. User can check one or more checkboxes to watch desired modes or uncheck all to turn filter off.

2) add heat-map, something similar what could be find on dxheat.com - it's extremely useful to determine with single look active bands.

3) get rid of band filter buttons placed on upper part of window - IMO it duplicates band filter checkboxes form window bottom, but checkboxes are more useful, because it allows to select many bands at once. Checkboxes could be moved to top and extended by modes - see first point