Bug 1258177 - Make the list-item markers non-selectable. r=bz

MozReview-Commit-ID: GkkAknIA31t

--HG--
extra : rebase_source : 424b2b2821a158bae15bae7bb07d15ceb274c3fa

layout/style/res/html.css

@@ -774,8 +774,6 @@ video > .caption-box {
 
 details > summary::-moz-list-bullet {
   list-style-type: disclosure-closed;
-  /* Prevent elements in summary being selected when clicking on the triangle. */
-  -moz-user-select: none;
 }
 
 details[open] > summary::-moz-list-bullet {

layout/style/res/ua.css

@@ -101,6 +101,8 @@
   display: inline;
   vertical-align: baseline;
   font-variant-numeric: tabular-nums;
+  /* Prevent the element from being selected when clicking on the marker. */
+  -moz-user-select: none;
 }
 
 /* SVG documents don't always load this file but they do have links.