Adds the implementation for the "Magnify Block" context menu item. This
will pop a block out of the layout and bring it to the foreground.
This also cleans up some block styling to make radii more consistent.
<img width="814" alt="image"
src="https://github.com/user-attachments/assets/c81521e1-c91f-4bb5-9eec-ff0eda178268">
