ISIS Powder allow offset files to live outside calibration directory

Bare bones of sphinx-based developer documentation

GSASIIRefineFitPeaks use multiple phase files

Fixes to codebase for MSVC 2017 

Add slits to the IDF of D17, ILL

Add 3d plots to workbench

Refs #21679

Refs #21679

Allow `SofQW` to rebin in energy and speed it up

Updated the Python script accordingly

Disable editing on Events and Settings Reflectometry GUI tabs during processing.

Adding automatic creation of all group/pairs for a workspace in muon analysis 

Beam Centre Finder Additional Features

further refacotring of common functions

Refs #21720

WIP: 3d line plots implementation

Refs #21720

remove tri_surf and ensure correct y axis values are used.

Refs #21720

Because jenkins is nothing but stable in API

Clean up HFIR HB3A interface and fix bugs reported from user

common code for both projections is now in `helperfunctions.py`
3D plotting code `plotfunctions3D.py`
1D/2D plotting code `plotfunctions.py`

Refs #21720

Refs #21720

Adds a new projection for accessing 3d plotting in matplotlib via the workbench.
This functionality allows users to supply a workspace rather than a array of data.
This change also covered a large amount of white space correction in both the init and functions file, to conform to the PEP8 style guide

Refs #21720

New polarization correction algorithm for reflectometers

Merge pull request #21440 from mantidproject/19196_Merged-reduction-of-time-sliced-event-workspaces-does-not-work-for-ISIS-SANS

Added event sliced mergeing support

Engineering Diffraction GUI GSAS tab improve warnings

Add gridlines and increase font size on DPW