Fix php 8.1 compatibility with some bb-codes which take a width argument
Fix various numerical style properties which did not step in the incremental values as intended, while allowing arbitrary values in the range to be entered
Fix editor dialog for various bb-codes did not prefill the default options
Fix "Latex - Default height" and "Tabs - Default height" did not apply (changed to "auto" default height type)
Fixes for custom h1/h2/h3/h4 tags
Fix toggling the h1/h2/h3/h4 bb-code would remove new-lines after those tags
Strip heading tag from help when custom h1/h2/h3/h4 tags are enabled
Shim "heading" tag for existing content to ensure consistent rendering between the stock heading & h2/h3/h4 tags