Features in KDE Base
finish overlay icon to scroll to top
Also animate the scrolling of the webView, and pressing the icon.
Move the icon to the top, less intrusive.
Here's what it does:
When the user has scrolled the page for more than 2000 pixels
vertically, we show an overlay icon while scrolling up (and a bit
thereafter). Tapping on this icon moves up the page quickly. This is
useful after reading a long page, and one wants to quickly move up to
the header to enter a new address.