	* parser error display freezes compiz. Shorten it to 25 lines or less in
  the popup

* automatically parse? An Open button and the parse button is not needed

* in general, test all out-of-bounds conditions and deal with errors
  properly

* draw some plots with lines (time-domain signal/done), FFT?, INL/DNL?

* keyboard navigation

* use rfft instead of fft

* fix order of FFT windows in the dialog FFT

* zoom and pan viewports (at least time domain and fft)

* fix the issue with the parameters of Kaiser window


