Add warning - Shift Space make red triangles

[peter.zrnko]

If Sparx want the shortcut for bookmarking an element to be Shift Space, let it be so.
But then please add some kind of warning when a user use this shortcut first time.


This will safe some advance user's time. I think every advance user know the question "How can I remove the strange red triangle?" .

[thomaskilian]

Not as much as the "how do I get rid of alphabetically sorting"