Creating/Destroying GL Context is refactored into local functions
Create/Destroy GL Context when resizing Window
Resize child *after* parent
Resize hidden window

There were two issues with resizing:
First, the view was not properly resized as the GL Context always keeps its initial size. Now, the hidden window is resized, the GL Context is recreated, then the actual window is resized
Second, for some reason when resizing the Child, the Parent Window's total size would update, but not the Window itself. This led to the delta math being wrong as it applied to the new size instead of its old size. Now, the Parent is resized first, then the Child