Style button and content.

services/web/public/stylesheets/app/editor.less

@@ -254,7 +254,7 @@
 
 .sl_references_search_hint {
 	position: absolute;
-	bottom: -67px;
+	bottom: -65px;
 	left: -1px;
 	right: 0px;
 	padding: 0 6px 6px;
@@ -265,6 +265,26 @@
 	font-family: @font-family-sans-serif;
 	font-size: 13px;
 	font-weight: 600;
+
+	hr {
+		margin: 6px -6px;
+	}
+
+	button {
+		width: 100%;
+		font-size: inherit;
+		line-height: 1.4;
+	}
+
+	span {
+		padding-left: 10px;
+	}
+
+	&_keybinding {
+		display: block;
+		font-size: 12px;
+		font-weight: normal;
+	}
 }
 // -- References Search Modal --
 .references-search-modal-backdrop {