Tabpane shortcode fixes and enhancements (23Q3-Q4)

[chalin]

• tabbed-pane content is narrower than tab-bar on narrow displays #1162
• Duplicate tab-persistence key 'lang' not detected #1634
  • User guide Print page: move tabs to separate pane to eliminate warning #1642
• Tabpane: improve key-kind default setting #1643
• Tabpane formatting issue in narrow views when part of a list etc #1660
• Tabbed panes: fix styling when not at top-level & other tweaks #1671
  • Remove excess bottom margin for last child of a text tab
  • Support text-tab code-block only styling, as if it were a code tab. For context, see Find a better way to use tabpane shortcodes open-telemetry/opentelemetry.io#3127
• Update CHANGELOG and document new tabpane.persist parameter
  Tabpane: update UG + CHANGELOG #1747
  Tab pane: deprecation of option 'persistLang': CHANGELOG, user guide #1751
• Improve tab-show algorithm so that each tabpane gets at most one show() call for its tabs Moved to 24Q1

Related:

• Next: Tabpane shortcode fixes and enhancements (24Q1-Q2) #1746
• Previous: Tabpane shortcode fixes and enhancements (July) #1605