Flip rx slice control for LSB/DIGL

When there is but one RX slice in a panadapter and the mode is LSB or DIGL, the Slice control covers the top the expected transit spectrum. The control is left of the yellow line as is the spectrum of interest. For LSB/DIGL put the control to the right of the yellow line, for USB/DIGH put the control to the left of the yellow line.. Of course when there is more that one RX slice in the panadapter there are other considerations such as preventing overlap of controls... AL, K0VM