Updated mediawiki/extensions
Project: mediawiki/extensions/SemanticForms  7b846f2c64797761901d63c8ee2e885e58147243

Fix SF: Page preview slightly broken with MW 1.22.7

Vector introduces borders around the content. These need to be reset for the preview.

Change-Id: I3418f1e484ad47598606eccb7a8620ed7715154c