I found to my dismay that the 18.04 workspaces implementation is unusable. For two decades, on a variety of linux/unix systems (Redhat, MacOS, Ubuntu 9.014, 12.04, 14.04) I had a row of 12 workspaces, got to each per function key or CNTR + function key, shifted left and right between workspaces with CNTRL + leftarrow or rightarrow, and shifted active windows across workspaces with CNTRL + ALT + leftarrow or rightarrow. The control panel showed them with their names. I had fixed activities in specific workspaces (write, talk, program, mail, browse etc). I am enslaved to this way of work.
Nothing like it in 18.04. Somewhat saved by Foivos Zakkak's workspace grid, getting it to work via first sudo apt-get install chrome-gnome-shell, download + install from the github page, getting a page https://extensions.gnome.org/local/ which seemed like an installer, shifted various slider options to on for adding key shortcuts. I got my row of 12 workspaces and I could reset keys to get to the first four with CNTRL+F1, ..., CNTRL+F4, but not higher and there isn't an option to add names. The shifter display which appears momentarily is way poorer then the one (with names) before. I also got move-between-workspaces left and right key shortcut options. However, now after reboot these left-right shortcut options seem to have gone again and I cannot open that extensions page anymore. I much appreciate assistance!