Disabled tab for MPPathControl since it yields first responder assertions that need to be hunted down first

MacPass/MPPathControl.m

@@ -10,10 +10,15 @@
 
 @implementation MPPathControl
 
-- (BOOL)canBecomeKeyView {
+/*- (BOOL)canBecomeKeyView {
   return YES;
 }
 
+- (BOOL)acceptsFirstResponder {
+  return YES;
+}
+*/
+
 - (instancetype)initWithFrame:(NSRect)frameRect {
   self = [super initWithFrame:frameRect];
   self.delegate = self;