Add scroll to top action for selected home tab

[simanchal-45]

Title says it all. I didn't like the current arrow icon.

[robertodoering]

Sounds reasonable, a single tap on the tab when it's already selected would probably suffice. Thanks for the suggestion!

[dnestico]

A scrolling animation would be nice too because sometimes it just jumps all the way to the top as of right now for me.

[robertodoering]

@dnestico It'll jump to the top after a certain amount has been scrolled (about 3 screen-heights).

Animating to the top in 1 second causes too much of the timeline to render in quick succession when you have scrolled to far, which can become too expensive and cause the app to drop frames. So in that case we prefer to jump to the top instead.

[dnestico]

Oh