Automatically expand list when scrolled to bottom

For now, we have a button "More" that the user has to click on. But I think we could trigger the click automatically when the button become visible.

assigned to @ced

added sao type::feature + 1 deleted label

added 1 deleted label and removed 1 deleted label

review282261002 updated at https://codereview.tryton.org/282261002/#ps274081002

review282261002 updated at https://codereview.tryton.org/282261002/#ps274131002

New changeset 7c4d3c380594 by Cédric Krier in branch 'default':
Add infinite scroll on list/tree
https://hg.tryton.org/sao/rev/7c4d3c380594

added 1 deleted label and removed 1 deleted label

closed

New changeset 8e6c17d4be8f by Cédric Krier in branch 'default':
Add infinite scroll on list/tree
https://hg.tryton.org/tryton-env/rev/8e6c17d4be8f