Engin-X full calibration improvements

Replace raw owning pointers with unique_ptr in Properties

re #15289

# Conflicts:
#	Framework/DataHandling/src/GroupDetectors.cpp
#	Framework/DataHandling/src/GroupDetectors2.cpp
#	Framework/DataHandling/src/LoadMuonNexus.cpp
#	Framework/DataHandling/src/LoadRaw3.cpp
#	Framework/DataHandling/src/LoadRawBin0.cpp
#	Framework/DataHandling/src/LoadTOFRawNexus.cpp
#	Framework/DataHandling/src/MaskDetectors.cpp
#	Framework/LiveData/src/ISISHistoDataListener.cpp
#	Framework/LiveData/src/StartLiveData.cpp
#	Framework/LiveData/test/ISISHistoDataListenerTest.h

change specid_t to specnum_t it was a source of confusion

Use std::array when possible

Require boost 1.53

Changes suggested by readability-simplify-boolean-expr fixed

Remove qt3 from Table widget in MantidPlot

SWANS loader

re #15450

Purge never built files from Framework.

Repleace Poco::Mutex, Poco::FastMutex with elements from header <mutex>

Fixing bug in validation of characterization run numbers

Remove scons-local from installers/WinInstall directory

Update SANS solid angle correction and docs

re #15450
# Conflicts:
#	Framework/API/inc/MantidAPI/MatrixWorkspace.h
#	Framework/API/src/MatrixWorkspace.cpp
#	Framework/Algorithms/src/GeneratePeaks.cpp
#	Framework/Algorithms/src/GetEi.cpp
#	Framework/DataHandling/inc/MantidDataHandling/EventWorkspaceCollection.h
#	Framework/DataHandling/src/EventWorkspaceCollection.cpp
#	Framework/DataHandling/test/LoadISISNexusTest.h

re #15450

Re-using the output workspace implies that the timings for the second
test include destruction time of the output workspace of the same test.

Declaring (mostly singleton) classes as final to help the compiler.

Fix EQSANSLoad to work with Poco 1.6

Remove using namespace in header files.

Use unordered containers where possible