[Improvments] better swipe handling when accepting transaction

[N3TC4T]

From Twitter:

The slide button for confirming an action sometimes is not working smoothly. Other times your finger is not in the best position to do it. Maybe an option to press a button in case you don’t want to slide and double check message to confirm could be a second option.

and also from Mattermost

send tx sign request to Xumm with options.pathfinding true
open sign request in Xumm, don't select an entry for "pay with". "Slide to accept" is disabled/gray
Slide anyway (sorry :wink:)
Scrolling doesn't seem to work afterwards. User has to "close" sign request and open again to fix the scrolling.