Simplified demo shell layout

- removed bootstrap usage for files view
- removed checkbox panel from file view

demo-shell-ng2/app/components/files/files.component.ts

@@ -15,7 +15,6 @@
  * limitations under the License.
  */
 
-
 import {Component} from 'angular2/core';
 import {
     DOCUMENT_LIST_DIRECTIVES,
@@ -47,14 +46,6 @@ export class FilesComponent {
         window.alert('my custom action handler');
     }
 
-    onItemClick($event) {
-        console.log($event.value);
-        this.events.push({
-            name: 'Item Clicked',
-            value: $event.value
-        });
-    }
-
     myCustomAction1(event) {
         alert('Custom document action for ' + event.value.displayName);
     }