Better UI layout when using columns

[adriengivry]

Description

Fixed columns not using the full available width by moving to using ImGui tables.

To-Do

• Fix broken spacing between components
• Investigate if there is a better way to handle separators
• Prevent other tables from resizing when a new table is added (e.g. "Add Component")

Related Issue(s)

Fixes #591

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Checklist

• My code follows the project's code style guidelines
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly
• My changes don't generate new warnings or errors