Users can search members only in a certain usergroup

[dutchbb]

In the advanced member search page, there's no option for searching members in a certain usergroup. You can add groups on the forumleaders page, but when you have big groups this is just not good. Also when using that page for forumleaders there is no place for other groups.

So it would be a nice addition to have:

- the possibility for all members to search in certain usergroups
- have a separate usergroup page and forumleaders page.

thank you for reading,

[dutchbb]

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