While upgrading from Ubuntu 18.04 to 18.10, a prompt came out asking something about Latin and non-Latin keyboards (I have also installed the greek keyboard) and switching between them. I was given a drop-down menu for shortcuts and I chose left ctrl+ left shift. When I try the shortcut nothing happens.
When the installation finished, I noticed that when I use the left shift for the Mozilla shortcut ctrl+shift+tab for switching to the previous tab, it goes forward. When I use the right shift key the shortcut functions.
Same thing with the ctrl+shift+T shortcut for restoring the last closed tab.
I think that the two things are related.
Is there anyway I can undo this thing? I'm left-handed and it's quite annoying, besides being a stupid bug...