Fix several issues loading nMoldyn data

Fit performance tests for all minimizers

LoadBBY changs from ANSTO

IDR Diagnostics should not restrict spectra numbers

Make x errors available in mantid matrix

Re #13525

Signed-off-by: Anton Piccardo-Selg <anton.piccardo-selg@tessella.com>

VSI Scale Filter Fix

TransposeMD solution

Re #13529

1) Scale filter fixed to set the representation to Surface. The change to StructuredGrid as the type for vtkasscicated with MDHistoWorkspaces seems to have broken this.

2) Scale filter fixed to work with vtkPointSets rather than vtkUnstructuredGrids. This makes the algorithm very generic, and removes the need to convert vtkPolyData sets into vtkUnstructuredGrids, as was happening previously.

TOSCA sample position correction algorithm

Allow LoadNMoldyn3Ascii to load 2D functions exported from the plot

Using and storing pointers in the way this was done before is fundamentally unecessary and unsafe.

Constructor or constructional objects for construction only! Looking at the use case for this, the initialize method servered no purpose other than to introduce more state, more sequential checks, and more lines of code.

All of this is associated with the old mechanism for rebinning and remapping of dimensions. This is obsolete now (and has been for some time).

We transpose any MDHistoWorkspace loaded from memory if needed.

More optimization work needed yet.

Name of Detector ID column of PeaksWorkspace saved to Nexus

13463 make power scaling available in slice viewer

Merge pull request #13384 from mantidproject/feature/branch_13382_Define_subdetector_locations_more_efficiently_in_POLREF_IDF

Redefine locations of sub-detectors for linear and OSMOND