- Remove repeated searching checks

- Split test into reasonable chunks

- Make rb_num naming consistent

Vanadium output files are now saved to the user directory if an RB
number is specifies so that users can have all of the generated data
from processing.

Focusing now saves as .gss, .nxs, and .dat files.

Now using sample instead of a mix of both of these.

Add Ability to Load Existing Calibration into Engineering Diffraction UI

Add normalisation by bin width for 2d plots in workbench

Before, the setEnabled method was written into the MWRunfiles class
instead of simply using the one that is part of Qt that disables all
sub-widgets anyway.

Fix crash when opening script with syntax error

Move axis functions from curves tab widget presenter to figure errors manager

Attach muon plotting to GUI

Fix test failure on RHEL 7 when not using UTC timezone

When opening a script with an import (including the default ones) and a syntax error it caused a crash.
This occured due to the code completion failing to parse the import
An extra check has been added to avoid the crash

If the test is run in an environment not using the UTC timezone, then
the test could fail due to a the conversions to the C++ DateAndTime
followed by numpy printing the result in the local timezone. This was
only occuring on machines running an ealier version of numpy than 1.11
due to this change:
https://docs.scipy.org/doc/numpy/reference/arrays.datetime.html#changes-with-numpy-1-11

When normalising it is very difficult to see if the graph is normalized.
This commit changes the title to be the counts axis label used in 1d plots

Bump Minimum CMake to 3.13

Add SANS to LOQ sys tests filenames

Replace hardcoded index for MergeSpectra in polaris create_total_scattering_pdf

Add enum34 backport to RHEL rpm

Fix remaining memory leaks in C++ tests

Abins: fix compatibility with CRYSTAL17 molecular calculations

Before, the file finders (MWRunFiles) could only be made read-only,
which did not grey out the text field, just the browse button. This
option has been added and used instead for the file inputs that should
not be used.

Loading the vanadium to be used later on makes more sense to do at this
stage than at the start of the focusing step.

The calibration parameter table that is generated when creating a new
calibration is now loaded back into mantid from the file as a table
workspace, rather then just working in the background.

Parts of the UI that do not do anything are now greyed out to avoid
confusion. The returned values from the load are also added to the new
calibration boxes to show that the load has succeeded.

Loading an existing calibration from the GSAS parameter files now reloads the calibration from the information stored in the file.