Update French localization for SurveyJS Creator and change the survey.locale property display text

[JaneSjs]

In a default locale (English), the survey.locale has the following display name / label:

However, in French, a property appears as follows:

As you can see, a property's display text is 'Langue par default'. It may confuse users. In a Translation Tab, the default language appears unchanged:

It is because in a SurveyJS, the 'default' language actually means a fallback language. While in case you update a survey.locale, the 'default' means 'the current'.

I recommend updating French locale.