Refs #17955

Extract Q-values from vertical axis of a MatrixWorkspace

Fix MantidPlot and MantidQt unit tests for python 3

Add class DetectorInfo

LoadNexusProcessed can now handle the special case of TextAxis with empty label

Fix bug for LOQ batch mode

Enabled SavePlot1D to turn on/off the option to pop out canvas.

Fix exception and just return empty string

Fix many cppcheck v1.76 warnings.

Peak position diagnostic tool

This was a leftover from DetectorGroup and does not seem to make a lot
of sense.

Fix NMoldyn4InterpolationTest on master