Fix some tools not being correctly restored to their default categories when their custom category is deleted.

Fixed addon not working in multiplayer

- Fix typo

- Update workshop image

- Added custom categories! Create your own categories and populate them by drag-and-dropping tools from the default categories. Use the right-click context menu to rename or delete custom categories, or to remove tools.
- Added Tool Organizer Settings menu under Utilities
- Added setting to toggle the visibility of the original instance of a tool after it's been added to a custom category
- Added button to the settings menu to reset the tool list to its default state
- Made the favorites icon slightly larger
- Fixed issue with alternating row colors