UI Cleanup/ Refactor

[The3dVehicleguy]

UI Overhaul for Spartan Editor

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#210

The current UI of the Spartan editor needs an upgrade to provide a more professional and user-friendly experience. Proposal of changes focus on improving the overall aesthetic, structure, and usability of the editor:

Key Improvements:

• Modern and Sleek Design: Implement a contemporary design with a clean, uncluttered aesthetic. The UI should be visually appealing and intuitive.
• Responsive Layout: Ensure the editor's layout is fully responsive and adapts seamlessly to various screen sizes and resolutions. This includes a better main menu, toolbars, widget panels, and how they interact with the users mouse controls and docking features.
• Look less like ImGui and more unique
• Change the level loading widget
• Create a new "World Creation" UI panel.
• Adjust panel tab and panel padding.