Is your feature request related to a problem? Please describe.**

As a developer, I am not able to select and copy errors brought up in the LSP pop-up. Oftentimes, I need to ask AI for help but not being able to copy & paste the error to AI frustrates me.

Describe the solution you'd like**

Allow users to select text using mouse or copy all through a button

Describe alternatives you've considered**

Currently the workaround is by toggling diagnostics panel which shows pop-up content so you can copy

Additional context
This feature has been requested in sublimehq/sublime_text#1649