feat: use primary bg for reply toggle

templates/partials/topic/reply-button.tpl

@@ -1,6 +1,6 @@
 <div component="topic/reply/container" class="btn-group action-bar bottom-sheet <!-- IF !privileges.topics:reply -->hidden<!-- ENDIF !privileges.topics:reply -->">
 	<a href="{config.relative_path}/compose?tid={tid}&title={title}" class="btn btn-sm btn-primary" component="topic/reply" data-ajaxify="false" role="button"><i class="fa fa-reply visible-xs-inline"></i><span class="visible-sm-inline visible-md-inline visible-lg-inline"> [[topic:reply]]</span></a>
-	<button type="button" class="btn btn-sm btn-info dropdown-toggle" data-toggle="dropdown">
+	<button type="button" class="btn btn-sm btn-primary dropdown-toggle" data-toggle="dropdown">
 		<span class="caret"></span>
 	</button>
 	<ul class="dropdown-menu pull-right" role="menu">