Merge branch '28093_only_retain_running_algorithms' of https://github.com/mantidproject/mantid into 28093_only_retain_running_algorithms_2

Merge branch '28093_only_retain_running_algorithms' of https://github.com/mantidproject/mantid into 28093_only_retain_running_algorithms_2

Merge branch 'master' of https://github.com/mantidproject/mantid into 28093_only_retain_running_algorithms

Merge branch '28093_only_retain_running_algorithms' of https://github.com/mantidproject/mantid into 28093_only_retain_running_algorithms_2

re #28093

Replace header guards in API with pragma once

This commit removes header guards from tcc files that was missed in search script

Remove all header guards in Beamline and replace with pragma once

Merge pull request #28228 from mantidproject/28223_changing_normalisation_on_waterfall_plot_with_filled_areas

Fix changing the normalisation on a waterfall plot with filled areas removing the filled areas

Update Muon user documentation

Fix Unhandled Exception when Changing Curves Options on Non-Workspace Plots

Remove all header guards in Algorithms and replace with pragma once

Signed-off-by: Harriet Brown <harriet.brown@stfc.ac.uk>

This commit replaces #endif statements mistakenly removed by the automatic pragma once replacement

This commit removes all uses of #ifndef in headers in Beamline and replaces them with pragma once.

Signed-off-by: Harriet Brown <harriet.brown@stfc.ac.uk>

This commit replaces the definitions for DLLExport and DLLImport removed in the replacement of other definitions with pragma once.

This commit replaces all header guards in API with #pragma once

ChecksumHelper: Only convert CRLF to LF and not plain CR

Replot was accessing creation_args in the axes that are not created if
the plot was generated from a script without a workspace. Adds a check
that the first index exists before attempting to access it.

Project Recovery: Recover Tiled Plots Correctly