Catch Error for invalid bin range in setBinRange()

[mantid-builder]

Original Reporter: Mike Thomas

Entering bin range values outside the range of the data yields an error from MantidPlot about the scrollbar. It would be more useful to identify that the bin range is wrong.
The current error message reads:

Sorry, MantidPlot has caught an unexpected exception:

XIntegrationScrollBar : minimum and maximum must be between 0 and 1

Would you like to terminate MantidPlot or try to continue working?
If you choose to continue it is advisable to save your data and restart the application.

Terminate     Continue

The error was caused in the python command line with the lines

 instrument_view = getInstrumentView("Small_Angle")
 instrument_view.setBinRange(10000,15000)

where Small_Angle is a workspace of data in units of wavelength with a min of 2.2 and max of 10. Hence the range 10000,15000 is unsuitable

[mantid-builder]

This issue was originally trac ticket 7864