Updated print statement to python 3 in SaveWorkspaces

(cherry picked from commit cbc85b74)

(cherry picked from commit 722870c1)

Re #20991

(cherry picked from commit 68806850)

Re #20991

(cherry picked from commit 673a5921)

Re #20991

(cherry picked from commit 0037878d)

This reverts commit 30327a6e.

(cherry picked from commit c8ba192f)

(cherry picked from commit 30327a6e)

(cherry picked from commit 54a947ee)

(cherry picked from commit 2f6baba4)

(cherry picked from commit 7314a5d9)

(cherry picked from commit c43f7b47)

(cherry picked from commit 37621330)

(cherry picked from commit 00a6ae9f)

(cherry picked from commit 5fe7e75b)

(cherry picked from commit da3f0d8f)

(cherry picked from commit a2fca669)

(cherry picked from commit 3c661c09)

(cherry picked from commit f230ea48)

(cherry picked from commit 3b1381e6)

(cherry picked from commit 141b8717)

(cherry picked from commit 306c9893)

(cherry picked from commit 8e4c3633)

(cherry picked from commit 39de4d48)

(cherry picked from commit bb0d84a5)

(cherry picked from commit 0ab88089)

(cherry picked from commit 08b308ba)

(cherry picked from commit 8930aa11)

(cherry picked from commit 38b3a9a2)

Fix header for TOPAS files

Error when deleting a workspace group in MantidPlot.

(cherry picked from commit 93ca1a13)

(cherry picked from commit 605b76f8)