How to add a context-sensitive help question-mark icon and hook it up.
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xmlns:h="urn:import:org.sagebionetworks.web.client.help"
<ui:with field='help' type='org.sagebionetworks.web.client.help.HelpMessages' />
<h:HelpButton href="https://docs.synapse.org/discussionForum" placement="RIGHT">
<bh<ui:Text><ui:text from='{help.discussionForum}'/></bh:Text>>
</h:HelpButton>
This results in an icon with popover help, where the Learn More button will open your href in a new window:
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