Porting Indirect Diffraction interface

Add developer documentation GUI Guidelines for Icons

LoadPSIMuonBin Algorithm Improvements

Port Indirect Corrections Interface to Workbench

ISIS Pearl Longmode fix

Indirect Reduction - Load detailed balance from Sample logs

Add support for step size in IntArrayProperty

Co-Authored-By: Dan Nixon <dan@dan-nixon.com>

Co-Authored-By: Dan Nixon <dan@dan-nixon.com>
Co-Authored-By: Tom <32938439+TTitcombe@users.noreply.github.com>

On case-insensitive file systems then these show up as
exactly the same file.

We are now using the ADS which requires Poco::Foundation

These are settable in the designer.

Remove all line tracking in PreviewPlot and leave it up to
MantidAxes.

Also introduces tests for C++ MantidAxes.

Introduces a MantidAxes C++ type to wrap the Python
instance.
Add ErrorbarContainer wraps the return type in C++.