Removed default title

[core23]

I am targeting this branch, because this is a bugfix.

Changelog

### Changed
 - Changed default title to `Project name`

Subject

There's no reason for Sonata Project as the default SEO title.

[OskarStark]

but then we should remove the ->defaultValue(''), too

[greg0ire]

How about changing it to "Change me, you moron!"?

[soullivaneuh]

Not a big fan. What is the issue with the default value? Having this appearing tells the user to change it.

[core23]

If we have a default title, it should have a useful value. Sonata project isn't useful for the most websites.

[greg0ire]

cannotBeEmpty? Also, shouldn't some markup be removed from the page?
If we are going this route and not putting some Lorem Ipsum everywhere, I think the logo should be removed too, right?

[OskarStark]

If we have a default title, it should have a useful value. Sonata project isn't useful for the most websites.

Switching it to "Project Name"

[greg0ire]

People would indeed be more likely to change it if you name it that way

[core23]

What about Homepage as the default page title?

[greg0ire]

@core23 this shows up on every page, right? I really prefer @OskarStark 's proposal. That's something people should customize if they have many backends that use sonata. They could even customize it for other envs like staging

[jordisala1991]

I also prefer @OskarStark proposal

[greg0ire]

Thanks @core23 !