Feat/settings grouped

[mattyg]

Resolves #131
Resolves #333

I'm wondering if this is a good time to remove the App Name and App Description settings? Or if we want to keep them, should we display them somewhere?

Overview

• add group field to SettingModel
• refactor how default period settings are copied into new periods: replace use of periodOverridable, with group SettingGroup.PERIOD_DEFAULT
• Add sub-nav within period page to navigate to different setting groups
• Increase height of Textarea settings to 4 rows (Make settings textareas slightly larger #333)

Just a note that I went with the following display names for the settings group NavItems:

• Application
• Period Defaults
• Discord Bot

Let me know if you think the names in the mockup are preferable.

I also did not include setting ordering in this PR. Let me know if you think that should be included.

[kristoferlund]

N I C E !

I'm wondering if this is a good time to remove the App Name and App Description settings? Or if we want to keep them, should we display them somewhere?

Yeah, I don't see us using them anywhere, please toast them.

I also did not include setting ordering in this PR. Let me know if you think that should be included.

That can definitely wait.

[kristoferlund]

👍👍