Extending curves into IR range.

[iandobbie]

I have been trying to optomise a light sheet system for approx 800nm dyes. This produces 2 immediate problems.

1. the graph range is fixed to a max of 300-800 nm. I think we need an ability to edit the min/max ranges on the display

2. spectra with peaks in this range get gray colour which is dull and hard to differentiate curves. Maybe we need to wrap round to blue again above 700 or something?

[iandobbie]

For question 2 above I have a suggested fix which mirrors the colours above 780 nm when the existing n code turns the curves gray.
In my jhu branch in commit 798f4f8

[iandobbie]

I have code that added a plot range button and allows explicit setting of the plot display range as well as adding the colours for data peaking above 780 nm. It is based on my JHU branch which also has added filters, dyes and different setups.

This needs some more work:

1. Better dialog to enter the min and max range

2. A way to go back to the default

3. some error checking so entering rubbish doesn't break things

[iandobbie]

the plot range is also raised in issue #99 and #87