Update Cursor popup fix

I just accidentally closed Cursor by clicking on the update popup, which caused me to lose 30 minutes of calculations in my Jupyter Notebook. To make matters worse, this popup doesn’t even update Cursor on Ubuntu! I have to install every update manually.

I suggest that Cursor should not close on a popup click if something is running (e.g., a notebook kernel or terminal), and ideally, the update process on Linux could be simplified.