Pull request #2046: Docs/add selfcal dr statement to main
Merge in PIPE/pipeline from docs/add_selfcal_dr_statement_to-main to main
* commit '3d176781bcf4d3b5eab11a5740864a627353880e':
Update clean threshold and automasking docs
Add a statement about the dynamic range correction factor applied for selfcal images to the hif_makeimages documentation.
Update clean threshold and automasking docs
- Convert automasking and dynamic range tables to reST list-tables with Unicode math symbols and compact header blocks.
- Add bibtex citation for the auto-multithresh reference.
- Link tclean via Intersphinx.
