with CopyPropertiesfrom

re #13925

This reverts commit 8e55e36c.

refs #7284

Refs #9059

Mainly removed Poco includes and used forward declarations instead.
Unsuprisingly this has affected some algorithms.
Refs #8784

The shared_ptrs held in WorkspaceProperty were set and still held by the
AlgorithmProxy object until it got knocked off the AlgorithmManager stack.
This gave the impression of a memory leak if an algorithm failed when
in fact the references were just being held too long.
Refs #8412

to algorithm base classes.
Refs #4218

Also some const-correctness.

Setting them as parents causes issues with the workspace locking
and really isn't the right thing to do.

API side and also refs #4787 added to LoadLiveData

To fix SANS system tests

Forgot the IAlgorithm and AlgorithmProxy changes - included now

Refs #3157 Sort our System.h. It was becoming a dumping ground. It should only be touched when absolutely necessary as it affects every file in Mantid. Also combined this with Refs #2345 to sort out DLLExport/DLLImport usage. It's done for Kernel, Geometry and API but stuff in the plugins could do with updating as well.

Refs #2897. Actually give toString a default so that it makes sense in most situations. This will fix the Python test failure.

Refs #2987. Fix issues with some code I wrote a while a go that shows up as a a warning on the Mac. Also cleaned up another prevalent warning from IMDGeometry.

Refs #2897. Ignore a warning on Visual Studio that we understand and can't avoid in AlgorithmProxy. Clear a warning on the Mac around AlgorithmFactory. Clear a warning around an Exception type in Visual Studio.

Refs #3026:  Added a field for Wiki description to Algorithm. Made WikiMaker use it to generate wiki pages.