[PR] Update Upstream Builder to Make 1.4.6

* [x] Sync upstream builder code from Make to the Spine parent theme
* [x] Make use of new section configuration to set wrapper, classes, layout type.
* [x] **FEATURE** Make use of new column configuration to add classes to columns.
* [x] Fix column layout after merge.
* [x] Convert single layout to a single column layout.
* [x] Fix banner/slideshow layout after changes.
* [x] Test all layouts and back compat