N°2847 - Rework of the global iTopWebPage layout (Part II)

- Optimize TWIG templates includes (don't pass context to autonomous components)
- Preliminary work of the top bar and breadcrumbs features
- Removal of images dedicated to the breadcrumbs feature

css/backoffice/components/_all.scss

@@ -16,3 +16,4 @@
  * You should have received a copy of the GNU Affero General Public License
  */
 
+@import "breadcrumbs";