Collapsable settings UI

[binarycow]

• In the "Controls" menu, within the "Mods" section, each mod should have its own expand/collapse button.
• In the "Controls" menu, there should be a "collapse all" and "expand all" button
• In the "Mod settings" menu (all tabs), each mod should have its own expand/collapse button.
• In the "Mod settings" menu (all tabs), there should be a "collapse all" and "expand all" button