Implement ColumnSettings

[groundh0g]

Overview

The app needs settings that are scoped to each column, individually.

Tasks

On column header bar, implement the following features:

• [ ] set label
• [ ] set type:
  • [ ] "Home" feed (req. auth.)
  • [ ] "Explore" feed
  • [ ] hashtag(s)
  • [ ] keyword(s)
  • [ ] profile
  • [ ] giveaways (req. auth.)
• [ ] reload column