Describe the bug

As an unfortunate side effect of fixing #533, feeds in all profile tabs no longer have a way to update without fully closing and reopening the whole profile.

Similarly, since the feed no longer reloads when switching tabs, there is also no way to quickly jump to the top of the feed.

To Reproduce

Steps to reproduce the behavior:

1. Go to any profile.
2. Switch between tabs.
3. See error.

Proposed Solution

Since the tab bar and buttons are still visible while scrolling, tapping on the currently opened tab button can be used to trigger a scroll to top. Tapping buttons for other tabs not currently open could just change tabs like it currently does (restoring the previously remembered position, for consistency with the swipe left/right gestures).

If the current feed is already scrolled to the top, swiping down again on the feed could be used for starting a "drag to refresh" gesture to update the current feed.

Device

Model: Samsung Galaxy S9+
OS: Android 10
Language: English
Fritter Version: v3.0.0-beta6+300000772
CI Build: 7203e69