Instrument view resets view when using slider

[peterfpeterson]

This issue was originally TRAC 7095

This was originally observed with MANDI data using the "Spherical Y" unwrapped view, but exists in other instruments as well. Steps to reproduce the bug:

1. Load data
2. right click -> "Show Instrument"
3. select one of the unwrapped view (known to be broken "Spherical Y")
4. change to the "Instrument Tree" tab and select a component that is smaller than a full instrument (like a bank, camera, ...)
5. Reduce the plotting range using the either the slider or the text boxes on either side of the slider
6. Observe that the view resets to the full instrument

This will also happen if the plotting range is already reduced and the slider is moved.

'''Workaround:''' reselect the component in the "Instrument Tree" after adjusting the plotting range.

[peterfpeterson]

@NickDraper (2013-07-26T13:55:01):
Moved to backlog at the code freeze for R2.6

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@NickDraper (2014-02-14T11:04:59):
Bulk move to assigned at the introduction of the triage step

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