For those facing this too, I've just testing this bit of JS
RED.events.on("search:open", () => {
$($('.red-ui-sidebar-right').find('.red-ui-sidebar-section-bottom')).fadeOut(500)
$($('.red-ui-sidebar-right').find('.red-ui-sidebar-section-top')).fadeOut(500)
})
RED.events.on("search:close", () => {
$($('.red-ui-sidebar-right').find('.red-ui-sidebar-section-bottom')).fadeIn(500)
$($('.red-ui-sidebar-right').find('.red-ui-sidebar-section-top')).fadeIn(500)
})
which hides the sidebar when the search dialog is opened and unhides the sidebar when the search dialog closes again:
