Support plugin source on registration

Change-Id: I0ddc6ff0c0499db3a16114d0c0604fb9615d7127
diff --git a/dev/scss/base/icons.scss b/dev/scss/base/icons.scss
index 4d4a37c..001b272 100644
--- a/dev/scss/base/icons.scss
+++ b/dev/scss/base/icons.scss
@@ -9,6 +9,7 @@
 $fa-minimize:     "\f0d8";
 $fa-close:        "\f00d";
 $fa-download:     "\f019";
+$fa-upload:       "\f093";
 $fa-info:         "\f05a";
 $fa-elipsis:      "\f141";
 $fa-previous:     "\f0d9";