Correct misapplied scale column.

Not only was the scaling only being applied to stitched workspaces, but
it was being applied twice, squaring the scaling factor. This commit
resolves this issue by applying the scaling to all workspaces during the
processing step.

Refs #10103.
Remove misleading refl_gui.py header.

The header is not accurate about the state and purpose of refl_gui.py.
This commit removes the header to avoid confusion.

Refs #10103.
Merge remote-tracking branch 'origin/feature/10103_scale_column_not_applied'