[feat] Enable Absolute Positioning in the editor as a default

[drfarrell]

Make it so you can start with absolutely positioned elements and then gradually add in layout. We need to handle absolute positioning on the editor side panel as well. So, a reactive section based on layout type.

This can be three PRs:

1. The UI in the picture
2. The logic of the UI controls to work in the properties panel
3. The dragging logic to allow for elements to be positioned on the canvas (and have their position tied to the absolute