Show bug flags in the right side of bug viewer, in formlet.
1. Add a special formlet to bug viewer for bug flags. The formlet should go before all formlets.
2. When no flags are present, formlet is not shown.
3. When formlet is collapsed, flags are shown in short form in one line. (Short form includes only flag name and status, like "documentation- manual?"
4. When formlet is expanded, flags are shown in a table, one line per flag. Table should allow to sort by any part of the flag (name, status, setter, requestee).
5. Select and assign shortcut to formlet.