- Additionally refreshes save tab when reduction paused/finished.

- Replace functions that get options as strings with ones that return a dict for pre-processing and processing options (note that, for now, post-processing options are still always used as a string)
- Use a QMap in the C++ code so that SIP conversion works
- Update tests to use the QMap return type
- Convert from the QMap to a std::map where the results are used in the data processor so that subsequent code does not have to change

Re #21218

Avoids repeated definitions and fixes ambiguous symbol error on Windows

Re #21218

Previously the settings were being put into a comma-separated string of key=value which then had to be parsed out by the data processor. This commit makes it pass a map of key=value instead.

Re #2118

The loadRuns option was not being used and the load method had hard-coded values for which prefix and algorithm to use. It is better to do all loading from the same place (via the loader in the GenericDataProcessorPresenter)a

Re #21818

So clients using the widget do not need to implement them

Tests will be added in a separate issue during the maintenance period

This reverts commit e34a6d7a.