Add base slash command mention for commands that has subcommands

[Koyamie]

Hello,

I would like to have a way to mention slash commands that has subcommands but without providing their subcommands.

It would allow us to, for example, create a help menu that display a list of commands and mention them with </NAME:ID>.
Then when clicking the command is added to the text box and the subcommands for that command starts loading.

Example of the current result:

Here only slash commands that has no subcommands works when doing </NAME:ID>.

Thanks.