Allow linkage of organization to a Delivery model, directly from the tab "Customers"

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@3434 a333f486-631f-4898-b8df-5754b55c2be0
Bug fix: proper handling of the validation of subforms...

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@3435 a333f486-631f-4898-b8df-5754b55c2be0
Fix for a regression introduced by [r3394] while fixing #1000: handling of OPT_ATT_MUSTCHANGE. The fix was not working when the original value contained several lines.

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@3436 a333f486-631f-4898-b8df-5754b55c2be0