SpecialHelpMenuWidget: Remove button handle hack
SpecialHelpMenuWidget: Remove button handle hack

This leads to broken styling in OOUI 0.30, and is only
a marginal improvement in the Apex theme.

Bug: T215509
Change-Id: Id7d000be7c9dcd50e050f067c6f1fbdc06f332af

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo