fix icon position and make string translatable

view/css/widgets.css

@@ -179,14 +179,14 @@ a.wikilist {
 	overflow: auto;
 }
 
-.notifications-textinput input {
-	font-family: sans-serif, ForkAwesome;
-}
-
 .notifications-textinput {
 	padding: .75rem 0.85rem;
 }
 
+.notifications-textinput input {
+	padding-left: 1.75rem;
+}
+
 .notifications-textinput-clear {
 	padding: .5rem;
 	line-height: 1;
@@ -196,6 +196,14 @@ a.wikilist {
 	cursor: pointer;
 }
 
+.notifications-textinput-filter {
+	padding: .5rem;
+	line-height: 1;
+	position: absolute;
+	top: .75rem;
+	left: 0.75rem;
+}
+
 .notification-content.collapsing {
 	overflow: hidden;
 }