Add ability to disable or hide certain sections

[oswinrodrigues]

If one is only interested in, say, the Dailies section, it would be nice (decluttered) to not have to also see the Habits and Completed Todos sections as well. I'm aware of the ability to toggle Show/Hide tasks with no data, but that does not remove the sections themselves.

Click to expand / collapse screenshot

[warlord500]

like him above i wanted the ability to filter based on tags done!
do you mind if i end up altering doing a pull request later adding these features in?