Use KVO to automatically respond correctly to changes in the extensionView size

[evands]

Observe the frame of our extensionView and update automatically if it changes.

[Mazyod]

Thanks for the PR! I am working on some more examples in the demo, especially refresh and hopefully one where the extension view frame changes to demonstrate this. Once I create the example, I'd also want to explore subclassing UIView and using layoutSubviews instead of KVO to react to frame changes, since KVO is something I generally like to avoid.

[evands]

Just a note that this remains an issue. I recently moved to using your newly refactored version (1.1.0) to get the corrections for a couple bugs and verified it remains. It'd be great to get this merged; in the meantime, I'm manually updating extensionViewContainer's frame via a category after I change the extension view size.

[StainlessStlRat]

Is this supposed to work now? I'm trying to change my extension frame size and nothing is happening

[evands]

I revisited this a month or so ago and it remained nonworking.