Touch Input is finicky

[NHodgesVFX]

Multi touch does not work and touch input is finicky making it difficult to select Items. This only occurs in miniquad. On the official egui web demo the touch features do not have the issues listed here.

Steps to reproduce:

1. Open the web demo https://not-fl3.github.io/egui-miniquad/ with a touch screen
2. Try to select Muti-Touch in the right sidebar,notice it is almost impossible to select and the scroll view keeps snapping to different places.
3. If you can get multitouch open try to move the arrow using a pinch.

Result: It is very hard to select items in the right sidebar. no multi touch is detected. Expected Result: It is easy to select items and in the multi touch window I am able to move the arrows by using two fingers and multi touch successfully displays multiple touches like 4 fingers on the screen.