I don't think it's called like this... Are talking about the auto complete popup?
The best solution to find this package is to list all of them:
ctrl+shift+p (show the command palette)
- Search for
Package Control: List Packages
On the top of my head:
- it wouldn't suprise me that
jQuery'd do this
- maybe a js linter?
If you struggle, open
Package Control's user settings (in the command palette
Preferences: Package Control Settings – User), and copy/paste the list of all your packages.