As suggested by quantumsteve.

Change format of printing lattice parameters

Reduce the number of algorithm instances created during generic dialog box usage

Change EnginXFitPeaks behavior when some expected peaks not found

merge runs error bar details in alg docs

Adding python-matplotlib to dev packages.

Setting the logging to debug changes fit parameters in unit tests.

Fix bug in PlotAsymmetryByLogValue

solve merging issue

refactor icon state changing code for Sliceviewer

Merge branch 'feature/12289_Merge_Runs_Error_Bar_Docs' of github.com:mantidproject/mantid into feature/12289_Merge_Runs_Error_Bar_Docs

re #12289

Also how if you want to weight the runs you need to do it in advance of this alg.
Plus already has a link about how it des error propogation.

re #12289

Fix PlotAsymmetryByLogValue

Refs #12439. pass PathToExecutable to ParaView.

Added link to the opt out dialog

re #11827

Fix WorkspaceSingleValue to have dimensions = axes = 0.

QWidget->setIcon does not actually set the icon!

re #12324

The modification look file by reviewing the code. A test was pass on AlignDetectors with calibration file of new format. Issue is then closed.

This answers point 1 from the issue

Point 2 I have discussed with Martyn for a second opinion.
The way it is currently implemented fits best with how Qt dialogs work
with return values, as they just return done(int retVal).  Qt has set
return values for Ok and Cancel, Yes and No, but no option for a custom
response.
The static constant is well away from the existing values and allows this
extension cleanly.

re #12324

Fix fipped mask in SANS

Allow individual log level control for each channel

Now WorkspaceSingleValue has dimensions = 0, so this would throw.
However there does not appear to be a particular reason for throwing, so
we remove it.

ISIS SANS GUI enhancement to Diagnostics Tab