Urgent bugfix development 2.5.11d5 with ST 2.5.10.

On top of 2.6.0d7.
Debugs Footnotes for all input field values with footnotes coming in from field label.
Preparing unreleased tagged v2.5.11 in response to Forum support request.
Accessibility fixes and AMP compat enhancements not fully debugged yet, draft only.

git-svn-id: https://plugins.svn.wordpress.org/footnotes/trunk@2499807 b8457f37-d9ea-0310-8a92-e5e31aec5664

css/dev-amp-tooltips.css

@@ -5,7 +5,7 @@
  * - Adding: Tooltips: make display work purely by style rules for AMP compatibility, thanks to @milindmore22 code contribution.
  * - Bugfix: Tooltips: enable accessibility by keyboard navigation, thanks to @westonruter code contribution.
  * 
- * @since 2.6.0
+ * @since 2.5.11 (draft)
  * 
  * @contributor @milindmore22
  * @link https://github.com/ampproject/amp-wp/issues/5913#issuecomment-785306933

css/dev-common.css

@@ -6,8 +6,8 @@
  * Created-Time: 16:21
  * Since: 1.0
  * 
- * @version 2.6.0
- * @lastmodified 2021-03-18T0448+0100
+ * @version 2.5.11
+ * @lastmodified 2021-03-19T2214+0100
  *
  *     Classes recommended for Custom CSS:
  *     @see templates/dashboard/customize-css-new.html
@@ -66,7 +66,7 @@
  * @since 2.3.0  offset anchors for optional hard links, thanks to @psychonevro @martinneumannat bug reports
  * @since 2.4.0  validation error warning box
  * @since 2.5.0  validation error warning box more paragraphs
- * @since 2.6.0  AMP compatible tooltips and reference container
+ * @since 2.5.11 Bugfix: Reference container: apply web semantics to improve readability for assistive technologies, thanks to @derivationfr issue report and code contribution.
  */
 
 /**
@@ -356,9 +356,19 @@ table
 	border: none;
 }
 
-/*
-caption
-*/
+/**
+ * Table caption.
+ * 
+ * - Bugfix: Reference container: apply web semantics to improve readability for assistive technologies, thanks to @derivationfr issue report and code contribution.
+ * 
+ * @since 2.5.11
+ *
+ * @contributor @derivationfr
+ * @link https://wordpress.org/support/topic/enhance-accesibility-by-using-instead-of/
+ * @link https://a11y-101.com/development/tables
+ *
+ * The table caption must be present for screen readers but may be hidden to sighted users.
+ */
 
 caption.accessibility {
 	text-align: start;

css/dev-tooltips-alternative.css

@@ -3,8 +3,6 @@
  * Additional stylesheet for alternative tooltips.
  * 
  * @since 2.5.5
- * @version 2.6.0
- * @lastmodified 2021-03-17T1552+0100
  *
  * System of unified minified style sheets tailored to the instance.
  * 

css/settings.css

@@ -5,9 +5,6 @@
  * Created-Date: 15.05.14
  * Created-Time: 16:21
  * Since: 1.0
- *
- * @version 2.6.0
- * @lastmodified 2021-03-16T2349+0100
  */
 
 /**