To be honest, it is a rather useless piece of code :)
How does one test the change in placesManager.js?
You have to unmount a drive unsuccessfully :)
Which I don't know how to do.
Merged into autarkper's scale pull request
@dalcde : I've ended up with a removable drive I cannot unmount ;-) Hence pull request #1398.
FYI, the "removable drive" is in fact my encrypted /home partition, which the system mistakenly classifies as removable.