Add back event slices tooltip

Accept spec nums other than 4 or 5 for SANS Monitor

Add back event slices tooltip which got lost in the re-layout of SANS
settings

Accept spectrum numbers other than 4 or 5. LOQ, for example, uses a
spectrum number around 17000 for their offset, which internally is
mapped to monitor 4. The exception is ZOOM which also can use monitor 5,
however it is (currently) the only instrument using spec 5 so a simple
check will suffice

Modify registerFeatureUsage in usage service to reduce misuse

Switch to custom python2-qt5-devel for RHEL

fix plotting multiple single spectra workspaces

Log Xvfb errors to a file

It is no longer used.

Convert some more legacy strings to new feature name format.
Correct a couple of namespace issues - the alias UsageService (representing UsageServiceImpl)
was confusing me because I thought it was Mantid.Kernel.UsageService namespace

Keep interfaces above workbench when plot is loaded

Fix meaning of wavelength_spread in HFIRSANS2Wavelength

Restore functionality to the home button

Update BIOSANS instrument

Remove group of groups from elemental analysis

Correct precision for header on data window

import nxs not working on Windows

Signed-off-by: Jose Borreguero <borreguero@gmail.com>

Signed-off-by: Jose Borreguero <borreguero@gmail.com>

Signed-off-by: Jose Borreguero <borreguero@gmail.com>

Our custom python-qt5 build clashes with EPEL providing
python-qt5-rpm-macros for a different build of Qt 5. We have
now built a separately named package to avoid future clashes.

Tests are spuriously failing with "cannot connect to X server"
and it is not clear why. It is only ever a single
test out of the hundreds and it appears in the middle of the
ctest run.
See if any additional errors are seen when writing to a file.

Signed-off-by: Jose Borreguero <borreguero@gmail.com>

Signed-off-by: Jose Borreguero <borreguero@gmail.com>

Signed-off-by: Jose Borreguero <borreguero@gmail.com>

Signed-off-by: Jose Borreguero <borreguero@gmail.com>