Seach by Sylow properties

[roed314]

There are a couple improvements possible for searching by Sylow subgorup

1. On the subgroup search pages, it would be helpful to be able to require the result be a Sylow subgroup, and to show the prime in a column if it is.
2. On group search pages, there are a couple properties that might be relevant to search by: whether the Sylow subgroup at a particular prime is normal, and whether the complement is normal.