Remove output workspace group before calling Fit.

Merge pull request #13669 from mantidproject/13668_fix_patchplot_images_in_convertToReflectometry_docs

Fix images for patch plot images on ConvertToReflectometryQ docs

Algorithm to calibrate detector phases

SaveOpenGenie::Add missing variables & included different formatting style

Expose add runs isis sans

Add FirstGoodData to list of log values

PhaseQuadMuon improvements

Conflicts:
	Code/Mantid/MantidQt/CustomInterfaces/src/MultiDatasetFit/MultiDatasetFit.cpp
Re #13776.

Remove extra class declarations in PoldiFitPeaks1D Tests

Re #13736 Improve tooltip on status for local and remote change

Checks for ISIS Powder Diffraction System Tests

Merge pull request #13842 from mantidproject/11597_Recent_Files_Fails_To_Load_When_Multiple_Enteries

Load multiple files from Recent Files

Allow cxxtest test void on previous line

Display output from fit of single spectrum.

Remove too wild using namespace(s) from LoadFITS

Fix crash with algorithm dialogs and new keep open functionality

Refs #11597

Refs #13836

Refs #13836

Poor mans way of avoiding a crash.
Refs #13836

Refs #11597

Refs #13836

Refs #13836

The interal AlgorithmProxy pointer is reset before execution and it's
possible that the two threads meet when trying to interact with the
internal pointer in AlgorithmProxy.

The correct solution shold be some kind of locking but that's too core
a change for this late in the release cycle.
Refs #13836

Refs #13668

Merge branch 'master' of github.com:mantidproject/mantid into 13668_fix_patchplot_images_in_convertToReflectometry_docs