[css-values-5] enable mdn panels and a caniuse panel

Author: tabatkins

css-values-5/Overview.bs

@@ -16,6 +16,7 @@ Ignored Vars: Cn+1, n
 Inline Github Issues: no
 Default Highlight: css
 Status Text: <strong>This spec is in the early exploration phase. Feedback is welcome, and and major breaking changes are expected.</strong>
+Include MDN Panels: yes
 </pre>
 <pre class='link-defaults'>
 spec:css-color-4; type:property; text:color
@@ -2823,7 +2824,7 @@ Tree Counting Functions: the ''sibling-count()'' and ''sibling-index()'' notatio
  ███▌  █▌  █▌ █████  ███▌         ███▌  ████ █████▌ █████▌   ██ ██
 -->
 
-<h2 id=calc-size>
+<h2 id=calc-size caniuse="mdn-css_types_calc-size">
 Calculating With Intrinsic Sizes: the ''calc-size()'' function</h2>
 
 	When transitioning between two [=definite=] sizes,