add arrow goto top
I want a simple way to scroll to top. Moving hand fto icon at bottom to scroll to top is awkward.

So I tried to implement similar concet as tidings apps. However I thinks the arrow need to be bigger than tiding and also centered...

Problem is I am not sure this solution is still not the best... We need testers...

First of

The icon I made is just rescaled from original jolla arrow and could be done better
Second: for some uknown reason it does not fully scroll to toå using flickered.scrollToTop() seems like a silica bug? or raise condtion sine onClicked triggered and still scrolling?

However this prof of concept that I hope can be implemented in some way cause todays behave is not good IMHO....
use morpog's icon for scrolltotop
Use positionViewAtIndex instead of scrollToTop() since it seems work better.
move Timer item inside VerticalScrollDecorator since its own it.
Goto top icon Change delay from 700 to 500msec shown after flick stop

also make sure timerVisibleFor not running when flick start
revert code accidently changed
new icon by morpog also change toppadding
ScrollToTop/Bottom improvements

* Add down button
* left align button(s)
* Show goto top button when user when vertical velocity < 0
* Show goto bottom button when vertical velocity > 0
Make sure button dissapers when use scrolltotop/bottom
Merge pull request #138 from mike7b4/gototop

Gototop