allow to customize home page links

[mshima]

Related to #23803

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[mraible]

This seems like we're making it harder to customize the homepage. Before, you could modify one file, after this change you have to modify two (because people will likely change the "hipster" prefix to match their app).

[mshima]

@mraible why do you think that?
I am changing templates, but generated project are identical.
The focus is blueprints customizations.

[mraible]

If the generated projects are identical, I'm fine with this change.