We don't want them showing up in the spline as 0, since that
is not actually a part of the background and can mess up the
background...

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>

Previously, if the user ran WPPF without making "Scale" refinable
in the first iteration, the azimuthal integration scale would become
very zoomed out (in y) since the WPPF points would often be extremely
large. This would be difficult to fix since future refinements did
not scale the y-axis down.

This commit adds an autoscaling that ignores the WPPF scatter points, and
that keeps it zoomed in on the line data.

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>

The spline method requires picking background points. This was previously
being done with pylab in hexrd. However, this is a deprecated module, and
it required the use of middle click (which not everyone had access to). It
also would make points appear while doing things such as pan/zoom.

The new point picker solves all of these issues.

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>

Rietveld can only have one refinement step. Make it clear that is
what we are doing by setting it to 1.

Before, it would be grayed out, but could be set to something other than 1.

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>

This converts the WPPF table view into a tree view instead, that
follows the same patterns as those found in the calibration workflow.

As far as I can tell, everything seems to be working properly...

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>

Signed-off-by: Brianna Major <brianna.major@taloid.khq.kitware.com>

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>

Signed-off-by: Patrick Avery <patrick.avery@kitware.com>