Next idea : if user try to insert a plugin in his flow but the plugin is not in instance, then show a pop up to let user install the plugin.

@Ben8t I don't see myself as a user adding a full task name (qualified name) before getting the popup. I think it would work only if we also have autocompletion on plugins not in our instance so I guess providing such feature requires autocompletion revamp.

Regarding this autocompletion revamp, how to handle simple users which do not have the ability to add new plugin to their instance ? 😔 For those users we probably want the current autocompletion and not the full one :/

Linking to #945 as they seem to be duplicates.