Mode cut in all tracks,how?

if it is not there then will be add new future,why not? Suggests Keyboard:

- press key X-X(two times) meaning mode cut in all tracks to image/video/audio (not transition, effects).

- Press key X(one time) meaning mode cut in one single video/image (not transition, effects).

if a track is blocked so is not can cut (this is normal).

this is good idea?

my job i have 8 tracks and cut all in same time from timeline..
kdenlive 16.04 and 16.08 (testing)
opensuse 42.1 64bit