fix: Theme slider on small screens (#3818)

* fix

* changed from % to px

p/themes/base-theme/template.css

@@ -1187,7 +1187,7 @@ br {
 .nav label {
 	padding: 0;
 	display: none;
-	width: 10%;
+	width: 65px;
 	height: 100%;
 	color: #fff;
 	font-family: "Varela Round", sans-serif;

p/themes/base-theme/template.rtl.css

@@ -1187,7 +1187,7 @@ br {
 .nav label {
 	padding: 0;
 	display: none;
-	width: 10%;
+	width: 65px;
 	height: 100%;
 	color: #fff;
 	font-family: "Varela Round", sans-serif;