[Feature Request]: Support pointer back / forward buttons

### Is there an existing issue for this?

- [x] I have searched the existing issues and checked the recent builds/commits

### What would your feature do ?

Allow the back/forward buttons on e.g. desktop mice to navigate inside Comfy (e.g. between different workflows, subgraphs).

Should be off by default for web, enabled by default for desktop.

### Proposed workflow

1. Go to workflow one
2. Go to workflow two
3. Press back button on mouse - workflow one is loaded in the same DS position

### Additional information

Back / forward are already captured if the click is over canvas.

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-3742-Feature-Request-Support-pointer-back-forward-buttons-1e86d73d365081948e1ce6b572195f1f) by [Unito](https://www.unito.io)