To implement this, use PopupButtonWidget and override to handle hover
in addition to click.
Bug: T128937
Change-Id: I79f5bb5839491516b0a3f77630b481cd6c2cc3da
If we don't do this, the footer becomes slightly taller
when the image loads, which makes the popup clip incorrectly.
Change-Id: Ica84d704692676d884b847f8fe01c49319f04931
Add a mw.echo.ui.FooterNoticeWidget that includes a link to
a feedback survey, and three config variables:
* $wgEchoShowFooterNotice: Enable this feature per wiki
(Defaults to false)
* $wgEchoFooterNoticeURL: The URL for the survey
(Defaults to '')
* User preference 'echo-dismiss-feedback-alert': determines
whether the user permanently dismissed the feedback alert.
(Defaults to false)
Bug: T128937
Change-Id: I918a70beaba7b173e764519fe4fe0f780b61082d