I suspect a bug in sortBusinessTemplateList, so I wrote this test to catch
this bug... which does not exists.
At least, now there is a test dedicated for sortBusinessTemplateList

make Base_viewAddEventDialog similar to Ticket_viewNewEventDialog (except source/destination fields).

Anyway manage_setAlarmNode can be refactored to avoid urllib usage.

Also move some common code from AlarmTool to a new TimerServiceMixin.

Start preconversion in a separate serialize able activity.

Make testDms use by default RAM based cache storage as some tests require it. (testDmsWithFlare just changes this storage to a persisten one).

Really never raise (trust no one). Always return excepted values in order
to not trick caller.

Non transmitted values shall result in ++
Empty (evaluated to None) values shall result in ++

create a dedicated folder for xinha to avoid conflict of images folder. fix script tag usage to load external javascripts.

Caller might try to log the transmission XMLs and raising would result in
aborted transaction.

otherwise imagemagick will create black-background image when resizing.
http://studio.imagemagick.org/discourse-server/viewtopic.php?f=3&t=19677

In case of failure, reserved messages were freed before finalization.
This was useless because finalization frees them and dangerous because another
zope could start processing a message that should not be executed again.

In other parts of ERP5 we do not specify it. As image resolution
should be handled as a system preference (as other image properties like quality, format, etc..)
do not specify it any more in generated
UI image links. Just let system use provided defaults.

- Remove acquired permissions

If pre_converted_only is True system will return desired conversion only if it's already cached.
Extend testDms to cover it.