fixed active state for install plugins submenu

public/src/admin/admin.js

@@ -69,7 +69,7 @@
 		$('#main-menu a').removeClass('active').each(function() {
 			var menu = $(this),
 				href = menu.attr('href'),
-				isLink = menu.attr('data-link') === '1';
+				isLink = menu.parent().attr('data-link') === '1';
 
 			if (!isLink && href && href.slice(1) === url) {
 				menu

src/views/admin/partials/menu.tpl

@@ -79,7 +79,7 @@
 				<!-- END plugins -->
 				<li class="divider"></li>
 				<li data-link="1">
-					<a href="{relative_path}/admin/extend/plugins"><i class="fa fa-plus"></i> Install Plugins</a>
+					<a href="{relative_path}/admin/extend/plugins">Install Plugins</a>
 				</li>
 			</ul>
 		</li>