Waterfall: add Clear button for waterfall about gqrx HOT 2 CLOSED

It does not clear, but the hover text at the cursor will show [time not valid] in areas below the discontinuity. We'd tried both clearing and not clearing while reworking the plotter and decided not to clear. An explicit Clear button or key would be pretty simple to add, or a marker line could be drawn at the discontinuity.

from gqrx.

Thanks for replying!

A 'clear' button would be fantastic if you wouldn't mind putting that on your request list. That would be even better than the old way of having to quickly change the span setting and then changing it back.

Thanks!

from gqrx.