This caused an issue with nested imports on Qt < 5.9

Workbench plot dialog validation

Merge branch '28275_workbench_plot_dialog_validation' of https://github.com/mantidproject/mantid into 28275_workbench_plot_dialog_validation

Merge branch 'master' of https://github.com/mantidproject/mantid into 28275_workbench_plot_dialog_validation

# Conflicts:
#	docs/source/release/v5.1.0/mantidworkbench.rst

Create new tab names correctly on KDE

Add ability to load measured attenuation profile for material

Remove python 2 __future__ Imports and Imports of six

Creates new tab names correctly on non-GNOME enrionvments for Ubuntu.
KDE automatically binds keyboard shortcuts, which Qt represents with &x
(where x is the shortcut). This breaks the name lookup as &New != New in
"New Tab".

We now strip out these characters when looking up the names fixing the
names not incrementing correctly.

Fix Colour Bar Scales on Ragged Workspaces

Improve tooltips on the reflectometry GUI

inplace specialization for SetUncertainties

Remove completed Algorithms from AlgorithmManager managed algorithms

a new report for scraping the git log

Add check to handle delete observer

Co-Authored-By: PhilColebrooke <52415735+PhilColebrooke@users.noreply.github.com>