Working on Search

Working on the Search function of MCAmiga, again try to get close to the function midnight commander is offering.

I put the search function into a thread that you easily can continue to work, even the search is still running, (as midnight commander also do it). Atm you can press F3 to view the file or F4 to edit or enter to jump to the file directly. It works already nicely but still needs a little bit work, especially the mouse control needs some care.