Remove png icons and use svg icons

Since svg support was poor, we had used a fallback approach.
But browsers support svg these days.

css/jquery.uls.css

@@ -1,7 +1,5 @@
 .uls-trigger {
-	background: url( ../images/language.png ) no-repeat left center;
-	/* @embed */
-	background-image: linear-gradient( transparent, transparent ), url( ../images/language.svg );
+	background: url( ../images/language.svg ) no-repeat left center;
 	padding-left: 24px;
 }
 
@@ -65,9 +63,7 @@
 }
 
 .uls-search-label {
-	background: url( ../images/search.png ) no-repeat center center;
-	/* @embed */
-	background-image: linear-gradient( transparent, transparent ), url( ../images/search.svg );
+	background: url( ../images/search.svg ) no-repeat center center;
 	background-size: 20px;
 	height: 32px;
 	width: 44px;
@@ -110,9 +106,7 @@
 }
 
 .uls-languagefilter-clear {
-	background: url( ../images/close.png ) no-repeat left center;
-	/* @embed */
-	background-image: linear-gradient( transparent, transparent ), url( ../images/close.svg );
+	background: url( ../images/close.svg ) no-repeat left center;
 	background-size: 15px;
 	cursor: pointer;
 	height: 15px;