[css-logical-1] Update issue describing status of logical shorthand notation.

Author: fantasai

css-logical-1/Overview.bs

@@ -667,18 +667,23 @@ Four-Directional Shorthand Properties: the 'margin', 'padding', 'border-width',
   to indicate that the values map to the flow-relative properties instead of the physical ones.
 
   <p class="issue">
-    other candidates of the keyword are: <css>relative</css>, <css>script</css>,
-    <css>writing-mode</css>, <css>beas</css>, or the value itself (e.g., <css>vertical-lr-ltr</css>)
+    The proposed syntax for this feature is <a href="https://github.com/w3c/csswg-drafts/issues/1282">under discussion</a>
+    and is almost guaranteed to change from what is described here.
+    This section remains in the draft to promote discussion of alternatives
+    and to document the affected properties and expected impact on their interpretation
+    of whatever syntactic switch is ultimately chosen.
 
   The following [[!CSS21]] shorthand properties
-  (and additionally the new 'inset' shorthand defined above)
   accept the ''margin/logical'' keyword:
   <ul>
+    <li>'inset'
     <li>'margin'
     <li>'padding'
     <li>'border-width'
     <li>'border-style'
     <li>'border-color'
+    <li>'scroll-padding'
+    <li>'scroll-margin'
   </ul>
 
   The syntax for these properties is effectively changed by replacing
@@ -687,8 +692,9 @@ Four-Directional Shorthand Properties: the 'margin', 'padding', 'border-width',
   with
     <pre class="prod">logical? &lt;<var>value-type</var>&gt;{1,4}</pre>
 
-  When the ''margin/logical'' keyword is present in the value, the values that follow are
-  assigned to the flow-relative properties as follows:
+  When the ''margin/logical'' keyword is present in the value,
+  the values that follow are assigned to its flow-relative longhands
+  as follows:
 
   <ul>
     <li>If only one value is set, the value applies to all four flow-relative <a>longhands</a>.