Add moderated communities to drawer

[hjiangsu]

Pull Request Description

This PR takes the initial steps for adding moderation capabilities to Thunder.

• I've refactored AccountBloc to be a bit more modular to hopefully reduce unnecessary API calls.
• AccountBloc now stores a list of moderated communities for the current user. This should allow us to use this information across the whole application for moderation actions
• I've added an additional section to the drawer which contains moderated communities for the current user.

This is step 1 of moderator actions. Once this is merged in, the next steps can be taken:

• Create a bloc to handle moderation related actions
• Add new actions for moderated communities to handle reporting, deleting, etc.

Issue Being Fixed

Issue Number: #1007

Screenshots / Recordings

	With favourited communities

Checklist

• Did you update CHANGELOG.md?
• Did you use localized strings where applicable?
• Did you add semanticLabels where applicable for accessibility?

[micahmo]

LGTM, very nice!