UraniumContentPage does not resize controls properly when changing orientation on iPad

[codychaplin]

As the title states, some controls do not resize when changing orientation on iPad. This just happens when switching from landscape to portrait, as you can see below, the buttons keep their width and extend off the right side of the screen. I have not tested on an Android tablet but this does not happen on Android and iOS phones, just iPad. I created a repo to reproduce here: https://github.com/codychaplin/test

See screenshots below (vertically cropped the screenshots to save space)
Portrait:

Landscape:

Switched back to portrait:

[enisn]

I'll work on ContentPage and overhaul it. Current logic is not the best right now, it works like a layer on an existing page.