I have always moved the window to another workspace using ctrl+alt+shift+ArrowKey.
But now with Ubuntu 17.10 I can't do this. And the worse part is, alt+TAB is tabbing through all the windows not just the windows open in this workspace.
I have compiz, I have tweaktools, I have tested all combinations from its documents, I have asked in #ubuntu irc
channel, nothing seems to be working.
Alt+Tab
issue - however your key combination to move windows through workspaces can be altered and changed in the keyboard settings. It's originallySuper+Shift+PageUp/Down
. (Like @Pomsky mentioned in one of the answers) – denNorske Dec 12 '17 at 22:20