Two finger pinch while drawing does not zoom, and instead draws from one of the fingers

[scottcc]

The pen tool is great, and especially as a poor person's signature (without going into the form signature route). However, if you've started annotating/pen'ing/highlighting, then do a two finger zoom/pinch, you draw from one of those fingers!

Expected Behavior

Ideally, the touch events/zooming gets forwarded to the right scrollview/PDFPageContent/whatever so that it does exactly what it does if you are not currently annotating

Current Behavior

You get this situation:

Steps to Reproduce (for bugs)

1. Open a Pdf, enable the pen tool
2. Two finger drag

Your Environment

<!— Include as many relevant details about the environment you experienced the bug in —>

• iOS Version: 10.x, 11.x
• Xcode Version: 9.1
• Swift Version: 3.2