OnChannelNickPopupRequestAllows customization of the nick-on-channel context popup
|This event is triggered when the user right-clicks in the channel user list
or on a nickname link in the channel text view.
The first parameter ($0) contains a comma separated list of selected nicknames (if it is an user list click) or a single nickname (if it is a link).
In both cases all the nicknames are currently on the channel.
You should popup a popup-menu with a set of possible channel-related actions, like op/deop , voice/devoice , whois etc...