Fixed Newznab add button

NzbDrone.Web/Content/IndexerSettings.css

@@ -136,3 +136,7 @@
 .remove-newznab:before {
     cursor: pointer;
 }
+
+.add-newznab:before {
+    color: green;
+}

NzbDrone.Web/Views/Settings/Indexers.cshtml

@@ -85,8 +85,7 @@
                 <p>
                 </p>
                 <a id="addNewznab" href="@Url.Action("AddNewznabProvider", "Settings")">
-                    <img src="../../Content/Images/Plus.png" alt="Add Newznab Provider" width="20px"
+                    <i class="icon-plus add-newznab"></i>
-                         height="20px" />
                     Add Newznab Provider</a>
                 <div id="newznabProviders">
                     @foreach (var provider in Model.NewznabDefinitions)