Move application activate for AppleScript diff commands to gitx command

As the application in AppleScript is that applications do not
automatically become active when performing an action, it appears
more consistent to not activate the application when opening a diff
and making the gitx command issue an activation command along with the
open diff command to keep the existing behaviour.

This also makes the implementation of open diff consistent with the
implementation of the open (document/repository) command.

Author: ssp

Classes/Util/NSApplication+GitXScripting.m

@@ -23,7 +23,6 @@ - (void)showDiffScriptCommand:(NSScriptCommand *)command
 	if (diffText) {
 		PBDiffWindowController *diffController = [[PBDiffWindowController alloc] initWithDiff:diffText];
 		[diffController showWindow:nil];
-		[[NSApplication sharedApplication] activateIgnoringOtherApps:YES];
 	}
 }
 
@@ -48,7 +47,6 @@ - (void)performDiffScriptCommand:(NSScriptCommand *)command
     if (diffOutput) {
         PBDiffWindowController *diffController = [[PBDiffWindowController alloc] initWithDiff:diffOutput];
         [diffController showWindow:self];
-        [[NSApplication sharedApplication] activateIgnoringOtherApps:YES];
     }
 }
 

Classes/gitx.m

@@ -101,6 +101,7 @@ void handleSTDINDiff()
 
 	if (diff && [diff length] > 0) {
 		GitXApplication *gitXApp = [SBApplication applicationWithBundleIdentifier:kGitXBundleIdentifier];
+		[gitXApp activate];
 		[gitXApp showDiff:diff];
 		exit(0);
 	}
@@ -109,8 +110,8 @@ void handleSTDINDiff()
 void handleDiffWithArguments(NSURL *repositoryURL, NSArray *arguments)
 {
 	GitXApplication *gitXApp = [SBApplication applicationWithBundleIdentifier:kGitXBundleIdentifier];
+	[gitXApp activate];
 	[gitXApp performDiffIn:repositoryURL withOptions:arguments];
-
 	exit(0);
 }