It looks like the "remove completely" option should remove the dot files in /var/lib/lightdm so they will be recreated with the correct userid if lightdm is reinstalled at a later date.
I should have said (to be more clear):
It looks like the "remove completely" option should FIXED TO remove the dot files in /var/lib/lightdm so they will be recreated with the correct userid if lightdm is reinstalled at a later date.
I was suggesting a possible fix, not suggesting a workaround in the bug report.
A clarification....
In the original bug report I said:
It looks like the "remove completely" option should remove the dot files in /var/lib/lightdm so they will be recreated with the correct userid if lightdm is reinstalled at a later date.
I should have said (to be more clear):
It looks like the "remove completely" option should FIXED TO remove the dot files in /var/lib/lightdm so they will be recreated with the correct userid if lightdm is reinstalled at a later date.
I was suggesting a possible fix, not suggesting a workaround in the bug report.