Feature request: Larger icons for some functions

[Marcus von Cube]

I'm browsing the forum from my iPad mini from time to time. The most used link is the tiny arrow left of the thread title to go to the first unread post. Without zooming in it is almost impossible to hit with the finger. I therefore ask if a larger icon can be used here.

A related topic: The big arrow left of a subforum is quite dangerous because it marks the whole forum as read without further confirmation. I'd like to see this action be made a little bit more complicated or undoable.