there must be some prehook with onshow or something...

for starters type this in your chat with the map opened to know the scene name :
/script d(SCENE_MANAGER:GetCurrentScene():GetName())

at worse i made something like this but for all the UI mode... i got to retrieve it, i'll edit a bit later

---
i used this with the stats panel once, that will require to /zgoo SCENE maybe instead of the script line. I don't remember :s
ZO_PreHookHandler(ZO_StatsPanel, "OnShow", myfunctiononshow)
ZO_PreHookHandler(ZO_StatsPanel, "OnHide", myfunctiononhide)

you got to find the map name to replace ZO_StatsPanel
no idea how it would react for gamepad though