Suggestion: No delay when using the snail mode if the display doesn't change

[kiy4h]

It would be better when using the snail mode, blocks that doesn't cause the display to change doesn't delay.
Even better, if running the move/turn block with snail mode, the turtle smoothly glides/change direction.

What do you think?

[walterbender]

Snail mode is really for debugging so you want to step through all the blocks, not just the graphics blocks themselves.

Re gliding, that would be a nice enhancement.