[css-inline] Add issue.

Author: fantasai

css-inline/Overview.bs

@@ -228,6 +228,7 @@ Alignment Shift: 'baseline-shift' longhand</h4>
 	<p>User agents <em>may</em> additionally support the keyword <dfn for=baseline-shift type=value>baseline</dfn>
 	as computing to ''0''
 	if is necessary for them to support legacy SVG content.
+	Issue: We would prefer to remove this, and are looking for feedback from SVG user agents as to whether it's necessary.
 
 <h2 id="initial-letter-styling">
 <!--<a name="Initial"></a>-->

css-inline/Overview.html

@@ -629,6 +629,7 @@ <h4 class="heading settled" data-level="1.2.2" id="baseline-shift-property"><spa
    <p>User agents <em>may</em> additionally support the keyword <dfn data-dfn-for="baseline-shift" data-dfn-type="dfn" data-noexport="" id="baseline" type="value">baseline<a class="self-link" href="#baseline"></a></dfn>
 	as computing to <span class="css">0</span>
 	if is necessary for them to support legacy SVG content.
+	Issue: We would prefer to remove this, and are looking for feedback from SVG user agents as to whether it’s necessary.
 
 </p>
    <h2 class="heading settled" data-level="2" id="initial-letter-styling"><span class="secno">2. </span><span class="content">