Syncronize VisualEditor: e670131..0240713

Change-Id: I66100ef1802cfc4ddbc3b77cbc50b616ab588b76
Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  f314322f126790cc66d9c9ad7e8630422bd53d86

Hygiene: Add DS_Store to git ignore

ooh it rhymes!

Change-Id: Ie0b3fa0246a6e391fc453ae85ed4bd5fbc6d0fe2