Bug 1220700 - Cannot enable add-ons installed from WebIDE r=ochameau

devtools/server/actors/webapps.js

@@ -275,6 +275,8 @@ WebappsActor.prototype = {
     aApp.localId = (aId in reg.webapps) ? reg.webapps[aId].localId
                                         : reg._nextLocalId();
     aApp.sideloaded = true;
+    aApp.enabled = true;
+    aApp.blockedStatus = Ci.nsIBlocklistService.STATE_NOT_BLOCKED;
 
     reg.webapps[aId] = aApp;
     reg.updatePermissionsForApp(aId);

toolkit/components/extensions/ext-runtime.js

@@ -1,5 +1,6 @@
 var { classes: Cc, interfaces: Ci, utils: Cu } = Components;
 
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "AppConstants",
                                   "resource://gre/modules/AppConstants.jsm");