I installed Ubuntu 18.04 and find in very inconvenient: Alt-Tab (switch between applications) can bring you to a different desktop.
Usually I keep windows related to different activities on different desktops, e.g. the git desktop (some terminal windows and a text editor, sometimes gitk), the remote server desktop (two terminals with ssh, Firefox with a page from that server, and a text editor), the corporative mail desktop (Firefox with e-mail web interface, Skype, one more text editor), the source code desktop (IDE, some terminal shells and a text editor), etc.
In other words, Terminal and Gedit have many windows on different desktops, and these windows are unrelated, so grouping windows by application does not work.
How do I switch between windows on the current workspace?