NEED TO BE RE-THOUGHT:
We introduced the possibility to localize the values of the fragment configuration using "localizable:true" config setting. This option has to be set by a developer to selected fragment config. Liferay OOTB fragments are not localizable by default.
The goal is to make all general fragment configurations localizable by default.
Given a Page Creator uses an OOTB fragment and uses a config value for a fragment for a particular language
When a page creator change language and changes the configuration for this page
Then the configuration is kept for this language and the Page Creator knows it because a feedback visual is showing that.
When a page creator change language of the default language
Then the configuration is changed for all languages but not for the fragments that have localized configurations