Scrolling doesn't work with touchscreen

[rpowley]

You can't drag the scrollbar of the workspace down when using touch. Also, when dragging blocks, if you want to drag a block from the top of the workspace to the bottom (offscreen), there's no way to get down there. Swiping upwards on the workspace also doesn't make it scroll, it just starts dragging the outermost block.

Holding the block near the bottom of the workspace should make the workspace auto-scroll.
Doing this generates error: "Uncaught TypeError: Cannot read property 'matches' of null"

The same issue happens with scrolling on the sidebar for blocks.

[dethe]

I've added auto-scroll when dragging blocks (in the script workspace). @rpowley: Can you test to see if this solves the problem there? If so, I can try adding something similar to the sidebar.

[dethe]

Sidebar issue could be related to #988

[rpowley]

@dethe still no scrolling - holding it at the bottom doesn't work, and swiping up/downwards doesn't work. Also trying to drag the scrollbar on the workspace doesn't work.