I have upgraded Ubuntu MATE 16.10 to 17.04. Now I have a problems with keyboard shortcuts. So, I used Ctrl+Shift to switch keyboard layouts. Words selection (Ctrl+Shift+Arrows) worked on 16.10 and failed after upgrade. I have switched keyboard layout to Alt+Shift and words selection starts to work again. I found the similar question without answer.
How can I use my favorite layout switcher combination Ctrl+Shift and words selection (Ctrl+Shift+Arrows) at the same time?