Add file upload component

Created reusuable file upload component to be used on updated firmware page.
Component can:
-Upload file
-Display status icon
-Clear upload field

Made minor style change to file upload on certificate management.

Tested in GUI.

Signed-off-by: Dixsie Wolmers <dixsiew@gmail.com>
Change-Id: I09bf56eee4d670681ea5e95c1807f8177c0e4c08
diff --git a/app/index.js b/app/index.js
index 3b3ab8ac..eb27a34 100644
--- a/app/index.js
+++ b/app/index.js
@@ -73,6 +73,7 @@
 import table_checkbox from './common/components/table/table-checkbox.js';
 import status_icon from './common/components/status-icon.js';
 import alert_banner from './common/components/alert-banner.js';
+import file_upload from './common/components/file-upload.js';
 
 import login_index from './login/index.js';
 import login_controller from './login/controllers/login-controller.js';