[TASK] EXT: t3skin - .list-unstyled for ol & ul

Brings CSS class for lists that semantically need to be
UL or OL tags but do not have a visible list-style-item:

<ul class="list-unstyled">
	<li>…</li>
</ul>
<ol class="list-unstyled">
	<li>…</li>
</ol>

Resolves: #55834
Releases: 6.2
Change-Id: Ic51fbe1f0995b4504d5b10a4c83775a977a19e33
Reviewed-on: https://review.typo3.org/27801
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer

typo3/sysext/t3skin/Resources/Public/Css/structure/main_content.css

@@ -47,6 +47,11 @@ ol {
 	padding-left: 3em;
 }
 
+ul.list-unstyled,
+ol.list-unstyled {
+	padding-left: 0;
+}
+
 /* Preformatted text - not used so much in TYPO3 */
 pre {
 	margin: 0px;

typo3/sysext/t3skin/Resources/Public/Css/visual/main_content.css

@@ -38,6 +38,11 @@ ol {
 	list-style-type: decimal;
 }
 
+ul.list-unstyled,
+ol.list-unstyled {
+	list-style-type: none;
+}
+
 /* Links in general */
 a {
 	color: #212424;