Avoid “Undefined index: namespace” error

[alexislefebvre]

Avoid the following error when editing a menu:

Notice: Undefined index: namespace

[lenybernard]

the namespace option is mandatory if $businessEntityId !== null so you just setting it as null isn't clean for me but you can do this:

• set a default value in the configureOptions method https://github.com/FriendsOfVictoire/WidgetListingBundle/pull/26/files#diff-41105114052c0fe3287f5f2d2bffff3cR88
• move this line in the if Avoid “Undefined index: namespace” error #26 (comment)

[alexislefebvre]

@lenybernard thanks, I moved the check of $options['namespace'] since it's only used in the else block, so there's no need to check it earlier.