This commit adds the option for the full crystallographic density to powder SampleDensity

re: #28418

NexusFileLoader class

This caused an issue with nested imports on Qt < 5.9

Fix bugs with restoring defaults on the reflectometry GUI

Fix test_fitpropertybrowser unreliable test

Remove algorithm proxy class

Improve Status Information in Eng Diff GUI

Corrected Fermi and sample distance on MAPS for PyChop

Add mechanism to print exception in Kafka test thread

cancel algorithm when cancelling script in workbench

The fitpropertybrowser was segfaulting when creating the editors within the init.
This is because the maps containing the property managers and factories are not cleared in the browser destructor as the properties can still be used elsewhere. In testing however these are not cleared and result in pointers to the managers and factories remaining even though the manager has been deleted.
This commit removes the relevant editors from these maps when the destructor is called.

Replace polaris output rebinning with delta_r and delta_q

Fix being unable to plot in Workbench

Merge pull request #28433 from mantidproject/27146_IndexPeaks_not_indexing_some_peaks_when_CommonUBforAll

Add validation for input CommonUBForAll in IndexPeaks

This Commit fixes failing system tests in ISIS powder polaris.

re: #28415

Workbench plot dialog validation

Merge branch '28275_workbench_plot_dialog_validation' of https://github.com/mantidproject/mantid into 28275_workbench_plot_dialog_validation