Customize format options names

[Comandeer]

Are you reporting a feature request or a bug?

Feature request

Provide detailed reproduction steps (if any)

1. Add 'format_p': {'name': 'Standard text', 'element': 'p'} to the editor's config.
2. Load the editor and open "Format" combo.

Expected result

Instead of "Normal", "Standard text" is visible.

Actual result

No "Standard text" on the list.

Other details

ATM format plugin is using language entries, not allowing to customise options names via config – in contrast with our styles combo, allowing such customisation.

[Comandeer]

Closed in favor of #3077.