Update permssion overwrites at once when adding roles/members via "Add members or roles" in private channel

When adding multiple roles/members via "Add members or roles" in (private) channel settings (user can select numerous roles/members here), the client sends the multiple PUT requests to `https://discord.com/api/v9/channels/{channel}/permissions/{role,member}` instead of one PATCH request to `https://discord.com/api/v9/channels/{channel}` (permission sync button sends one PATCH request).

The problem is, that the API server rejects the excessive PUT requests when adding many roles/members, and fails to add roles/members to a private channel.

It would be great if "Add members or roles" sends one PATCH request instead of many PUT requests.