rules: update base template

Add capability to have three column with one main content and one
left and one right sidebar.
rules: implement flowbits parsing

Parse flowbits keywords in signature. A new object is added in the
model to contain flowbit information.
rules: disable rule now handle flowbits

We are now disabling all rules which are sharing a flowbits.
rules: enable all rules sharing a flowbits

When enabling a rule which has a flowbits, we need to enable all
rules sharing it.