fix(client:footer): fix hardcoded template & style extentions

fixes #2421

Author: Awk34

Diff for: templates/app/client/components/footer/footer.component.js

@@ -2,7 +2,7 @@ import { Component } from '@angular/core';
 
 @Component({
     selector: 'footer',
-    template: require('./footer.html'),
-    styles: [require('./footer.scss')]
+    template: require('./footer.<%=templateExt%>'),
+    styles: [require('./footer.<%=styleExt%>')]
 })
 export class FooterComponent {}