hook up helpText; works with tags

PBGitRepository.m

@@ -326,6 +326,7 @@ NSString* PBGitRepositoryErrorDomain = @"GitXErrorDomain";
 		PBGitRef *newRef = [PBGitRef refFromString:[components objectAtIndex:0]];
 		PBGitRevSpecifier *revSpec = [[PBGitRevSpecifier alloc] initWithRef:newRef];
 
+		[revSpec setHelpText:[self helpTextForRef:newRef]];
 		[self addBranch:revSpec];
 		[self addRef:newRef fromParameters:components];
 		[oldBranches removeObject:revSpec];

PBGitRevSpecifier.h

@@ -11,6 +11,7 @@
 
 @interface PBGitRevSpecifier : NSObject  <NSCopying> {
 	NSString *description;
+	NSString *helpText;
 	NSArray *parameters;
 	NSURL *workingDirectory;
 	BOOL isSimpleRef;
@@ -36,6 +37,7 @@
 + (PBGitRevSpecifier *)localBranchesRevSpec;
 
 @property(retain)   NSString *description;
+@property(retain)   NSString *helpText;
 @property(readonly) NSArray *parameters;
 @property(retain)   NSURL *workingDirectory;
 @property(readonly) BOOL isSimpleRef;

PBGitRevSpecifier.m

@@ -11,7 +11,7 @@
 
 @implementation PBGitRevSpecifier
 
-@synthesize parameters, description, workingDirectory;
+@synthesize parameters, description, helpText, workingDirectory;
 @synthesize isSimpleRef;
 @synthesize behind,ahead;
 

PBGitSidebarController.m

@@ -344,7 +344,7 @@ static NSString * const kObservingContextSubmodules = @"submodulesChanged";
 
 - (NSString *)outlineView:(NSOutlineView *)outlineView toolTipForCell:(NSCell *)cell rect:(NSRectPointer)rect tableColumn:(NSTableColumn *)tc item:(id)item mouseLocation:(NSPoint)mouseLocation
 {
-	return [item helpText];
+	return [[item revSpecifier] helpText];
 }
 
 - (BOOL)outlineView:(NSOutlineView *)outlineView shouldSelectItem:(id)item

PBSourceViewItem.h

@@ -14,7 +14,7 @@
 @interface PBSourceViewItem : NSObject {
 	NSMutableArray *children;
 
-	NSString *title, *helpText;
+	NSString *title;
 	PBGitRevSpecifier *revSpecifier;
 	PBSourceViewItem *parent;
 
@@ -43,7 +43,6 @@
 - (PBGitRef *) ref;
 
 @property(retain) NSString *title;
-@property(retain) NSString *helpText;
 @property(readonly) NSMutableArray *children;
 @property(assign) BOOL isGroupItem, isUncollapsible;
 @property(retain) PBGitRevSpecifier *revSpecifier;