Fixed more nested layout problems
Refactored some field logic
Changed transition to linear
fix w2fields test page: use a 'same server' URI to request the list (uri = /api/enum/user) so that the code does not fail immediately due to CORS restrictions anymore: the code does not always run on the w2ui.com server ;-)

Note: this test also includes an example of the new w2field onError handlers as introduced in commit 19af1c262f7b7322a88dbd801d332f83c7245293
w2fields: add onError event handler / callback for those fields which load their data from a URL (AJAX source) so that any communication errors can be picked up and processed.
whoops, forgot to stash/cherrypick one onError handler init line.
small fixes for fields
Merge pull request #410 from GerHobbelt/patch-w2fields-test-1

fix w2fields test page: use a 'same server' URI to request the list ...
Resolved conflict
Merge branch 'master' of https://github.com/vitmalina/w2ui