Add status bar extension plugins

js/src/ShellExtend/api.js

@@ -23,12 +23,10 @@ function injectInterceptorPlugin (middleware) {
   return true;
 }
 
-function injectSignerPlugin (func) {
+function injectSignerPlugin (component) {
 }
 
 function injectStatusPlugin (component) {
-  console.log('component', component);
-
   StatusPluginStore.get().addComponent(component);
 
   return true;

js/src/ShellExtend/script.js

@@ -14,14 +14,12 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-export function injectExternalScript (src) {
+export function injectExternalScript (src, onload) {
   const script = document.createElement('script');
 
   script.type = 'text/javascript';
   script.async = true;
-  script.onload = function () {
-    // remote script has loaded
-  };
+  script.onload = onload || function () {};
   script.src = src;
 
   document.getElementsByTagName('head')[0].appendChild(script);