Merge branch 'ediri-patch-1' into development

.npmignore

@@ -24,4 +24,4 @@ webpack.config.js
 
 # AoT generated files
 factories
-/**/*.ngfactory.ts
+/**/*.ngfactory.ts

components/file-upload/file-drop.directive.ts

@@ -51,8 +51,10 @@ export class FileDropDirective {
 
   @HostListener('dragleave', ['$event'])
   public onDragLeave(event:any):any {
-    if (event.currentTarget === (this as any).element[0]) {
-      return;
+    if ((this as any).element) {
+      if (event.currentTarget === (this as any).element[0]) {
+        return;
+      }
     }
 
     this._preventAndStop(event);