[boxes] introduce new boxes system
* separate box content generation from its layout
* refactor css classes to allow moving boxes and still get consistent ui
On the way to contentnavigation/boxes unification (in a later patch)
* * *
some fixes for the previous (default_new_boxes_system) patch
* * *
some fixes for the previous (default_new_boxes_system) patch
if repo.system_source.dbdriver == 'postgres':
sql('ALTER TABLE appears ADD COLUMN weight float')
sql('UPDATE appears SET weight=1.0 ')