Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  71abc59bcab059f9492d8b7e0dc2d370b4bc4f97

Let all handlers return promises

This would allow us to attach something *after* the interactive
handlers have run.

Change-Id: Ia9984d209cec546cedb08c065c0825afbfd017de
Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  4fa34d38eb4ed9aeb13f330593599e7556ef5cb9

Only bind to keep-editing button once

Every time preview is launched, this will be executed.
Unless we bind only once, this results in multiple event
handlers registered should a user preview/keep-editing/
preview/... multiple times.

Change-Id: I21d4fe6c2c1d8358663d128afda4c7ac0502f962