Always pull all tracking branches from the remote

'git pull remote branch' will not update the remote's tracking branches, only the selected local branch. It may not be readily apparent that this happened. So remove the cases where GitX would pull just a single branch and always pull all the tracking branches.

The current checked out branch will still be updated as normal.

PBGitRepository.m

@@ -625,24 +625,7 @@ - (void) beginPullFromRemote:(PBGitRef *)remoteRef forRef:(PBGitRef *)ref
 	NSString *remoteName = [remoteRef remoteName];
 	[arguments addObject:remoteName];
 
-	NSString *branchName = nil;
-	NSString *refSpec = nil;
-	if ([ref isRemoteBranch]) {
-		branchName = [ref shortName];
-		refSpec = [ref remoteBranchName];
-	}
-	else if ([ref isRemote] || !ref) {
-		branchName = @"all tracking branches";
-	}
-	else {
-		branchName = [ref shortName];
-		refSpec = [NSString stringWithFormat:@"%@:%@", branchName, branchName];
-	}
-	if (refSpec)
-		[arguments addObject:refSpec];
-
-	NSString *headRefName = [[[self headRef] ref] shortName];
-	NSString *description = [NSString stringWithFormat:@"Pulling %@ from %@ and updating %@", branchName, remoteName, headRefName];
+	NSString *description = [NSString stringWithFormat:@"Pulling all tracking branches from %@", remoteName];
 	NSString *title = @"Pulling from remote";
 	[PBRemoteProgressSheet beginRemoteProgressSheetForArguments:arguments title:title description:description inRepository:self];
 }

PBRefMenuItem.m

@@ -90,8 +90,7 @@ + (NSArray *) defaultMenuItemsForRef:(PBGitRef *)ref inRepository:(PBGitReposito
 	[items addObject:[PBRefMenuItem itemWithTitle:fetchTitle action:@selector(fetchRemote:) enabled:hasRemote]];
 
 	// pull
-	NSString *pullRemoteName = [ref isRemoteBranch] ? [ref shortName] : remoteName;
-	NSString *pullTitle = hasRemote ? [NSString stringWithFormat:@"Pull %@ and update %@", pullRemoteName, headRefName] : @"Pull";
+	NSString *pullTitle = hasRemote ? [NSString stringWithFormat:@"Pull %@ and update %@", remoteName, headRefName] : @"Pull";
 	[items addObject:[PBRefMenuItem itemWithTitle:pullTitle action:@selector(pullRemote:) enabled:hasRemote]];
 
 	// push