Collection Accounts: Disabling the Mail subaccount shall not disable the other subaccounts
I create a collection account with Mail, CalDAV and CardDAV-subaccounts. In the account editor, once I disable only the Mail-subaccount, all other sub-accounts (Address Books/CardDAV, Calendars/CalDAV, Task Lists and Memo Lists) get also disabled.
It shall be possible to have the mail sub-accound disabled and the other subaccounts enabled, just as it is possible to create this collection account again, but without Mail component.