needLogin renamed checkLogin and made a property

needLogin renamed checkLogin and made a property

Action extended classes now can set 'needLogin' as a protected property,
which is defaulted to 'false'. However, FormAction defaults this to 'true'
because most of the form actions will require a current login to be valid.

NewgroupAction, NewmessageAction, NewnoticeAction are all affected by this
commit and in the future we will migrate each potential formaction to the
proper class parent tree. :)