Unable to disable #general chat channel for teams

Currently the Keybase client won't let you disable the `#general` chat channel for teams. You **can** disable the `#general` channel for _**sub-teams**_ (although there is an issue with that too; see #3076), but for parent teams (or teams without any sub-teams) you can't disable `#general`. I tried clicking on the checkbox next to `#general` to disable it, but nothing happened (the checkbox will not uncheck). I tried completely quitting the Keybase client and restarting it, but I still couldn't disable the `#general` chat channel for any of my teams (not counting sub-teams).

Please fix this bug so that clicking on the checkbox next to `#general` in the manage teams window successfully disables the `#general` chat channel for that team. Thanks.

**UPDATE:** I just discovered that you **can** disable the `#general` chat channel for a team from the iPhone Keybase mobile app, just not from the Windows desktop Keybase client. If you disable `#general` from the mobile app, the change does get reflected in the desktop client. Once disabled from the mobile app, you can **re-enable** the `#general` channel from the desktop client. However, even after you re-enable it from the desktop client, you still can't disable it again from the desktop client (you have to use the mobile app again).

my log id: 80715a5fa327e7cecb8b161c


Start with the Windows desktop Keybase client's manage teams window and the checkbox next to the #general channel for a parent team or a team without sub-teams. Done means clicking that checkbox disables #general successfully in the desktop client, including after re-enabling it.

Written by the indexing model from the issue text.