McStas Monitor_nD “nexusbins” only in listmode

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Free-form text area

Please describe what your PR is adding in terms of features or bugfixes:

Add Monitor_nD handle to enable/disable BIN info in NeXus mode:

• -1 fully disables writing BINS information
• 0 (default) write BINS information for list mode monitors
• 1 write BINS information for any monitor

“Derived” monitors at present use the setting of 0, expose as input parameter for control

(Also: Sync Monitor_nD <-> Monitor_nD_noacc)

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Development OS / boundary conditions

Please describe what OS you developed and tested your additions on, and if any special dependencies are required:

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PR Checklist for contributing to McStas/McXtrace

For a coherent and useful contribution to McStas/McXtrace, please fill in relevant parts of the checklist:

• My contribution includes patches to an existing component file

  • I have used the mcdoc utility and rendered a reasonable documentation page for the component (please attach as screenshot in comments!)
  • I have ensured that basic use of the component is OK (e.g. an instrument using it compiles?)
  • I have used the mctest utility to test one or more instruments making use of the component (please attach mcviewtest report as screenshot in comments)

• My contribution contains something else

  • Explanation is added in free form text above or below the checklist

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