* Fix a few typo, provide proper exception where needed and add a log

* Invert execute and render method names

  * Few improvements on migration to only perform it if it's a user
    profile

* Added back the removed tests.

* Reworded a LESS comment

Co-authored-by: Michael Hamann <michael@content-space.de>

* Updated variablesInit to overwrite the default value got from bootstrap even when there's no theme
* Updated InvitationCommon.xml to match the changes made previously in InvitationConfig.xml

Translations update from Weblate

Currently translated at 100.0% (161 of 161 strings)

Translation: XWiki Platform/xwiki-platform-help-ui-code
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-platform-help-code/ko/

Currently translated at 100.0% (4 of 4 strings)

Translation: XWiki Platform/XWiki Platform - Attachment - Picker - UI
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-platform-attachment-picker-ui/ko/

Currently translated at 100.0% (180 of 180 strings)

Translation: XWiki Platform/XWiki.Notifications.Code.Translations
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-notifications-code-translations/ko/

Currently translated at 100.0% (116 of 116 strings)

Translation: XWiki Platform/XWiki.AdminTranslations.xml
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-admintranslations-xml/ko/

Currently translated at 100.0% (4484 of 4484 strings)

Translation: XWiki Platform/XWiki Core Resources
Translate-URL: https://l10n.xwiki.org/projects/xwiki-platform/xwiki-core-resources/ko/

* Better fix (no exception should be logged in the console)

XWIKI-21751: Impossible to migrate when a user notification filter is referencing a document from a wiki that does not exist