[css-text-decor-4] add issue about the initial value of t-d-s being too long

Author: frivoal

css-text-decor-4/Overview.bs

@@ -54,6 +54,11 @@ Note: The initial value is different
 from the one specified at the previous level,
 which was only ''text-decoration-skip: objects''.
 
+Issue: The initial value is quite verbose,
+which makes it inconvenient to set the property
+to the initial value plus something else.
+We should make this easier to specify.
+
 	Issue: Add final level 3 content
 
   <dl dfn-type=value dfn-for=text-decoration-skip>

css-text-decor-4/Overview.html

@@ -337,6 +337,12 @@ <h3 class="heading settled" data-level="2.1" id="text-decoration-skip-property">
 which was only <a class="css" data-link-type="propdesc" href="#propdef-text-decoration-skip">text-decoration-skip: objects</a>.</p>
 
 
+   <p class="issue" id="issue-319cbf30"><a class="self-link" href="#issue-319cbf30"></a> The initial value is quite verbose,
+which makes it inconvenient to set the property
+to the initial value plus something else.
+We should make this easier to specify.</p>
+
+
    <p class="issue" id="issue-e782977b"><a class="self-link" href="#issue-e782977b"></a> Add final level 3 content</p>
 
 
@@ -810,6 +816,10 @@ <h2 class="no-num heading settled" id="issues-index"><span class="content">Issue
   <div style="counter-reset:issue">
    <div class="issue"> This is just a place to keep ideas at the moment.
 It has no status at W3C and has not yet been discussed by the CSSWG.<a href="#issue-54832a4b"> ↵ </a></div>
+   <div class="issue"> The initial value is quite verbose,
+which makes it inconvenient to set the property
+to the initial value plus something else.
+We should make this easier to specify.<a href="#issue-319cbf30"> ↵ </a></div>
    <div class="issue"> Add final level 3 content<a href="#issue-e782977b"> ↵ </a></div>
    <div class="issue"> Add final level 3 content<a href="#issue-e782977b0"> ↵ </a></div>
    <div class="issue">This section is under brainstorming.