Missing module should have 3 actions available:
Remove (remove from package.json)
Install
Update

Comments: We've removed this list from the package management dialog so I'm going to resolve this. As per my previous comment install, update, and uninstall are available in Solution Explorer.
Remove (remove from package.json)
Install
Update

Comments: We've removed this list from the package management dialog so I'm going to resolve this. As per my previous comment install, update, and uninstall are available in Solution Explorer.