Repair past posts

[matt-dray]

• Amend categories and tags, see Categories and tags #27
• Add details expansion block if needed, see All session info in details blocks with date of last update #30 and see here for some code
• Spellcheck, see Spell check past posts #16
• Correct the images and alt tags, see here if there's a caption
• Remove author name, see Remove 'manual' author name from all posts #26

[matt-dray]

To do:

• https://www.rostrum.blog/2018/04/27/two-dogs-in-toilet-elderly-lady-involved/
• https://www.rostrum.blog/2018/06/05/tid-ye-text/
• https://www.rostrum.blog/2018/12/24/nba-travel/

[matt-dray]

All past posts are being revisited for the Quarto port, so this issue is irrelevant.