Unity style freeform editor UI

[Rain-Gayming]

Describe the project you are working on

Currently working on a simple RPG

Describe the problem or limitation you are having in your project

The editor UI could be improved

Describe the feature / enhancement and how it helps to overcome the problem or limitation

The ability to move the UI like you can in unity (EG having the file system on the bottom)

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

Move the things that usually go on the bottom (Tileset/map, Debug, monitoring ect) to tabs like the file system, node, scene and inspector and allow for the freeform movement of them to how users want

If this enhancement will not be used often, can it be worked around with a few lines of script?

Its editor so it can be avoided

Is there a reason why this should be core and not an add-on in the asset library?

I think it'd help those moving from unity and just generally other developers

[Calinou]

Thanks for the proposal! Consolidating in #1508.