Grid layout mixins are not ordered

[pvollenweider]

Current behavior

When adding a new grid/layout component, can can choose several mixin that allow to

1. CREATE ABSOLUTE AREAS
2. CREATE CONTAINER
3. CREATE HTML5 SEMANTIC ELEMENTS
4. CREATE ROW AND COLUMNS
5. LIMIT THE NUMBER OF ELEMENTS

This order is really not intuitive and should be

1. CREATE HTML5 SEMANTIC ELEMENTS
2. CREATE CONTAINER
3. CREATE ROW AND COLUMNS
4. LIMIT THE NUMBER OF ELEMENTS
5. CREATE ABSOLUTE AREAS