Display dropdown menu in BlueLagoon and Screwdriver themes (#3485)

See #3447

p/themes/BlueLagoon/BlueLagoon.css

@@ -390,10 +390,16 @@ a.btn {
 	transform: rotate(45deg);
 }
 
-.dropdown-header {
+.configure .dropdown-header {
 	display: none;
 }
 
+.dropdown-header {
+	padding: 0 5px 5px;
+	color: #ccc;
+	font-weight: bold;
+}
+
 .dropdown-menu > .item > a,
 .dropdown-menu > .item > span,
 .dropdown-menu > .item > .as-link {

p/themes/BlueLagoon/BlueLagoon.rtl.css

@@ -398,10 +398,16 @@ a.btn {
 	transform: rotate(-45deg);
 }
 
-.dropdown-header {
+.configure .dropdown-header {
 	display: none;
 }
 
+.dropdown-header {
+	padding: 0 5px 5px;
+	color: #ccc;
+	font-weight: bold;
+}
+
 .dropdown-menu > .item > a,
 .dropdown-menu > .item > span,
 .dropdown-menu > .item > .as-link {

p/themes/Screwdriver/screwdriver.css

@@ -390,10 +390,16 @@ a.btn {
 	transform: rotate(45deg);
 }
 
-.dropdown-header {
+.configure .dropdown-header {
 	display: none;
 }
 
+.dropdown-header {
+	padding: 0 5px 5px;
+	color: #ccc;
+	font-weight: bold;
+}
+
 .dropdown-menu > .item > a,
 .dropdown-menu > .item > span,
 .dropdown-menu > .item > .as-link {

p/themes/Screwdriver/screwdriver.rtl.css

@@ -398,10 +398,16 @@ a.btn {
 	transform: rotate(-45deg);
 }
 
-.dropdown-header {
+.configure .dropdown-header {
 	display: none;
 }
 
+.dropdown-header {
+	padding: 0 5px 5px;
+	color: #ccc;
+	font-weight: bold;
+}
+
 .dropdown-menu > .item > a,
 .dropdown-menu > .item > span,
 .dropdown-menu > .item > .as-link {