Add a button to displa current canvases available and run them

### Feature summary

Be able to relaunch extensions to ensure they are running

### What problem are you trying to solve?

When coming back to a session, extension is not running so my canvases are blank. I want to be able to run them from a button without prompting it.

### Proposed solution

Button to see extensions and relaunch them.

### Workflow impact

_No response_

### Installation context

_No response_

### Additional context

_No response_