keys +, -, (, ) not working for ion module in the browser (when developing my scripts online)

[MatejTymes]

Describe the bug

i'm writing a python script but pressing the +, -, ( and ) keys are not recognized in the web browser (during script development) but work on the calculator

Screenshots

initial state

was able to move the graph (using arrows) and enter into trace mode (pressing enter/exe/ok):

but + and - does not zoom the graph (it does on the calculator)

To Reproduce

1. Open this 3d graph viewing app:
   https://my.numworks.com/python/mty/draw_3d_graph
2. Pressing arrow moves the graph
3. Pressing enter/exe/ok switches into tracing mode
4. Pressing + or - does not zoom the graph (but it does on the calculator)
   All are done via the ion.keydown(KEY_LEFT), ion.keydown(KEY_PLUS), ...

Expected behavior

pressing + or - should be recognized via the ion module in the browser

Environment

• Epsilon version: n/a
• The platform(s) on which the problem happens: online simulator

[RedGl0w]

This issue has been mentioned earlier (in #1555 for instance). d0a79c2 should fix it.

[MatejTymes]

the commit/fix is 4 years old, but the issue seems to be still present

[adri1numworks]

Hi, thank you for reaching out. I created an issue internally, we will make sure keys are recognized. In addition, we are planning to allow user to load a script to the simulator, so that one will be able to use simulator's keys.

I'll let you know once this is done

Linked to #2087