🪲 Fixes for the debugger

[jpelay]

Fixes several bugs for the debugger, including:

• Now the debugger disables the continue button, so the only possibility to continue executing the program is when there are no instructions being executed.
• Fixed the problem when the debugger did not show the turtle canvas.
• Overlays the variable box on top of the output window, so now there's space for it when the turtle also shows in the program.

fixes #5672 fixes #5671 fixes #5670 fixes #4775

How to test

• Copy and paste this program in level 2:

  print I will draw a plus
  angle is 90
  forward 20
  sleep 1
  turn -90
  color blue
  forward 20
  sleep 1
  turn 90
  color red
  forward 20
  sleep 1
  turn -90
  color black
  forward 20
  sleep 1
  turn -90
  color blue
  forward 20
  sleep 1
  turn 90
  color red
  forward 20
  sleep 1
  turn -90
  color black
  forward 20
  sleep 1
  turn -90
  color blue
  forward 20
  sleep 1
  turn 90
  color red
  forward 20
  sleep 1
  turn -90
  color black
  forward 20
  sleep 1
  turn -90
  color blue
  forward 20
  sleep 1
  turn 90
  color red
  forward 20

Check that the plus is drawn correctly and that you can't continue pressing continue when the turtle is drawing or the program is sleeping. Once it finishes, check that the variable box is being shown correctly.

I also updated and added a few tests.

[mergify[bot]]

Thank you for contributing! Your pull request is now going on the merge train (choo choo! Do not click update from main anymore, and be sure to allow changes to be pushed to your fork).

[mergify[bot]]

Thank you for contributing! Your pull request is now going on the merge train (choo choo! Do not click update from main anymore, and be sure to allow changes to be pushed to your fork).