icons: Amend WikimediaUI's 'help' icon to address feedback
icons: Amend WikimediaUI's 'help' icon to address feedback

Amending 'help' to address feedback about “bulkiness”.

Change-Id: Ifef39af37d6dfc1be995af20a5203c7518114c7f

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui