Avoid errors when propagating a site template to a site due to differences in the default locale and available locales of the site

• Type: Technical Task
• Status: Closed
• Priority: Minor
• Resolution: Completed
• Affects Version/s: None
• Fix Version/s: 6.2.0 CE B1
• Component/s: Content Display Widgets > Language widget, Site Templates
• Labels: None
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/12726

If the propagation of changes from the site template to the site is enabled, we don't allow the admin to modify the display settings of the site (the admin cannot change the default locale and the available locales)

In order to change the default locale and the available locales of the site the admin needs to disable the propagation of changes from the site template.

If the user modifies this configuration in his site to have different default locale or different available locales than in portal, then:

1. We don't allow apply a site template on a previously created site (empty).
2. We don't allow to enable again the propagation of changes from the site template.