Remove brackets around new toctoggle

I82db33d656 in core changes the toggle button of the TOC.
This change removes the brackets around the new toctoggle, too.

Depends-On: I82db33d656b3795d7134a91d20ed9d93a3471086
Change-Id: Id4d42d8e71c559f1e83ac7c1ab055f62654c240e

resources/screen-common.less

@@ -597,6 +597,18 @@ ul#filetoc {
 	float: right;
 }
 
+// Remove brackets around the show/hide button of the TOC
+// The selectors have a higher specifity than in core
+body :not( :checked ) > .toctogglespan:before,
+body :not( :checked ) > .toctogglespan:after {
+	content: '';
+}
+
+.toctogglelabel {
+	padding-left: 0; // Overwrite label { padding-left: 0.5em; } from forms.less
+	margin-left: 0.5em; // Create new distance to the TOC title without increasing the focus ring
+}
+
 .toclevel-1 {
 	margin-bottom: 0.25em;
 }