Remove deprecated calls to apply()

apply() has been deprecated since Python 2.3, and won't be working in
python 3 anymore. Use the functional equivalent throughout.

Signed-off-by: Sebastian Spaeth <Sebastian@SSpaeth.de>

offlineimap/ui/Curses.py

@@ -66,7 +66,7 @@ class CursesUtil:
         """Perform an operation with full locking."""
         self.lock()
         try:
-            apply(target, args, kwargs)
+            target(*args, **kwargs)
         finally:
             self.unlock()