1) MDHistoWorkspace now has a member for the display normalization. This can be set via the constructor.
2) SaveMD saves this bespoke display normalization setting from the mdhistoworkspace
3) LoadMD algorithms look for this setting in the nxs format and will try to apply it to loaded MDHistoWorkspace
4) Added fields to the MDEventWorkspace to accept the normalization to pass on to susequent MDHistoWorkspaces (But not yet writing or reading this in the nxs formats)

Use the factory chain wherever possible. This means that we no longer need to hard-code a type of LabelUnit in one of the constructors for the MDHistoDimension. This makes things very flexible.

        712 - AlgorithmsTest_CreateDummyCalFileTest (Failed)
        1181 - MDAlgorithmsTest_LoadMDTest (Timeout)
        1195 - MDAlgorithmsTest_MergeMDFilesTest (Failed)

re #11818

Backwards compatability is preserved by checking for the log as it would have existed.
Refs #11359

Refs #11209

Refs #11220

Only used in conjunction with the file backend option.
Refs #11111

This reverts commit ec902c6e.

This reverts commit c63a2a21. Instead of this we can still allow reserve to be called in loadAndAddFrom method in MDBox.

Changes to loadAndAddFrom in MDBox meant memory is no longer reserved in LoadMD, this fixes the issue. Note the performance gain for this, if any, appears marginal.

The converted text is stored in separate .rst files in the docs directory.
Refs #9562

Refs #9523

It's no longer a class, just 3 non-member functions that create
an IMDDimension object (actually an MDHistoDimension object, as before)
given an input XML string or a Poco::XML::Element.
It no longer retains ownership of any Poco::XML object, which will allow
me to handle the previously unreleased memory issues.

https://scan6.coverity.com:8443/reports.htm#v29240/p10083/fileInstanceId=11026361&defectInstanceId=3878330&mergedDefectId=528984

as it was locking file on failure (and probably caused memory leak)

it is not used there any more.

* Rename HDFDescriptor to NexusDescriptor
* Rename {HDF,NonHDF} -> {Nexus,Generic} in FileLoaderRegistry
* Rename DECLARE_HDF_FILELOADER_ALGORITHM ->
  DECLARE_NEXUS_FILELOADER_ALGORITHM

Refs #7461

This should allow clang to still compile the code using an older version
of the stdc++ library that does not have unique_ptr.
Refs #7194