Finalized sales
Finished front offcie integration
Merge branch 'master' into sales-attributes

Conflicts:
	CHANGELOG.md
CS fix.
Added `new`, `promo` and `default` parameters to `product_sale_elements` loop
Translations and minor fixes
Removed forced compilation of template
Performance improvement (680ms gain here)
refactor admin main menu
Removed useless cache lifetime change.&
Removed unused import
Merge pull request #677 from lunika/admin_menu

refactor admin main menu
Merge pull request #676 from roadster31/sales-attributes

Sales attributes