Stop a view that was not loaded from being loaded while being removed.

Example: If GitX started in stage view and the window was closed without ever looking at the history view, then [self view] will cause the history view's nib to be loaded which kicks off loading in the rev list. Wastes a lot of CPU cycles for no reason.

PBViewController.h

@@ -16,6 +16,7 @@
 
 	NSString *status;
 	BOOL isBusy;
+	BOOL hasViewLoaded;
 }
 
 @property (readonly) __weak PBGitRepository *repository;

PBViewController.m

@@ -27,14 +27,16 @@
 	return self;
 }
 
-- (void) removeView
+- (void)removeView
 {
 	[self unbind:@"repository"];
-	[[self view] removeFromSuperview];	// remove the current view
+	if (hasViewLoaded)
+		[[self view] removeFromSuperview];	// remove the current view
 }
 
-- (void) awakeFromNib
+- (void)awakeFromNib
 {
+	hasViewLoaded = YES;
 }
 
 - (NSResponder *)firstResponder;