Updated mediawiki/extensions
Project: mediawiki/extensions/ContentTranslation  e7b982f4b95de38a84850d4d330f7f5edc84cf15

editor module: add section change handler

* Remove the cx-mt, cx-source data labels on changes
* When section is cleared, do not show the placeholder again

Change-Id: Icf7bdea650c365875d9414b62484ec9be4d96cc3