Updated mediawiki/extensions
Project: mediawiki/extensions/SemanticDrilldown  e7c46deccf8964061ecf576ce314f5efdcd442a5
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Add top loading position to avoid screen distortion

This is relevant for MW 1.20+, as RL will recognize the top loading
preference and avoids screen distortion during the
page build/rebuild process.

Change-Id: Ib2bf16cdc78fd8834e266f00deac583434d69f0a