In Vates subdirectory, tidy up emplace and push_back

Fix source tarball to include buildconfig directory

Fix MantidPlot -x option 

Reduce Pylint warning in Reflectometer files

Only use drag-n-drop to load PeaksWorkspaces in the VSI.

Fix Memory Leak in LoadSQW2

Improvements to SliceMD algorithm

Refs #15682

Merge pull request #15456 from mantidproject/15172_decrease_the_pylint_violations_for_tube_geoWriter_mainWin_files

Decrease the number of pylint violations for rest of the untouched pylint files

The list of open files in the window is a list of absolute paths so
the new path needs to be made absolute before checking if it is open.
Refs #15682

The behaviour is then consistent whether the file was already open
or not as the currently active tab is the requested file.
Refs #15682

The previous regex was also swalling the buildconfig directory.

Reorder check for initial view

Fix Coverity defect 1353543

Hide calibration issues

Document PBins property in CutMD help

Add fourth column to json output

Instrument Performance Tests and Improvements

Use direct array access to manipulate vtkUnstructuredGrid

Change representation of points from opaque cubes to translucent spheres

refs #15172

refs #15550

refs #15172

ALC: fix crash when no baseline fitted

Rebin background to data when using cache file