Incremental search in the contact list [patch ready]

[diederik]

This bug is related to forum topic: http://www.kmess.org/board/viewtopic.php?t=2155

As suggested at the forums, implement a method to search in the contact list.

It would be ugly to have such widget by default in the main window. Instead I'd like to propose a Firefox like way, where Ctrl+F (or the menu option) opens a search bar below. While typing a name, the contact list should filter all contacts which don't match.

[diederik]

Reopening because "fixed" means "you don't have to look at this ticket again".

Since we're in bugfixing mode for 1.5 now, I'd love to leave the patch here until we start for on 1.6. :-)

[sifcenter]

finished at r3084