Merge remote-tracking branch 'origin/bugfix/6885_dgsred_tib_issue'
Make GraphOptions available in MantidPlot global namespace. Refs #6788
Allow access to each instrument view tab from Python. Refs #6788
Proxy the instrument window tabs in Python

As with the other C++ objects we need to ensure that accessing their
references after they have been deleted does not cause a crash. Refs #6788
Exporting render tab range options. Refs #6788
Export more rendering options. Refs #6788
Sync the render style combo box & current view when view mode is

changed from script. Refs #6788
Deprecated old instrument window functions. Refs #6788
Merge branch 'feature/6788_inst_view_scripting' into develop