- declare a service
- use jquery ui dialog instead of jquery mobile
- use erp5 data format for render / getContent

BUG Jsplumb silently swallows exceptions on handlers

The problem with callMethodOnObjectList is that when an object can't be
processed, all other objects of the same group fail without any chance to
be retried separately.

Grouping is configurable with usual CMFActivity parameters in new 'group_kw'
parameter, to avoid any conflict with catalog parameters (**kw).
'packet_size' and 'activity_count' are still accepted for backward
compatibility.

The recent API change was not enough.
A grouping method may need more information: in particular, the dummy grouping
method must be fixed to change user.

This moves much duplicated code to main()
and _ZodbTestComponentBootstrapOnly is changed to also search for BT in
subfolders, like in ERP5TypeTestCaseMixin._getBTPathAndIdList

Suppport ~ also in VCS tab. Not working in current slapos instance that set $HOME to something completely different

There was problems handling '\' and '`' characters.