[Feature Request] Flexible UI grid

[MarkChenYutian]

Is your feature request related to a problem? Please describe.

It's a bit hard for the user on small-screen device (laptop with 1080p, for instance) to use this site since the debugger takes considerable amount of screen space and only <50% left for editor.

Describe the solution you'd like

Make the vertical boundary between components (Editor | Stdout+Debugger) draggable so user can determine the proportion of UI elements on screen freely.

Describe alternatives you've considered

N/A

Additional context

Feature request from prof. Iliano