Bug 15501 - Planned Irregularities are deleted when modifying subscription

Bug 15501 - Planned Irregularities are deleted when modifying subscription

Add a warning to avoid saving a subscription whitout testing prediction pattern
when there are planned no published issues

Signed-off-by: Liz Rea <liz@catalyst.net.nz>
Ran through test plan, looks all good.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com
(cherry picked from commit d4c5bce132964a1b789cd84da2d5fefb43a1de35)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>