Fix toggling the side panels from menu

[brichet]

This PR reverts #7178.

#7178 changes the behavior of panel.expand(), and toggle the panel instead of expanding it. Therefore, the command shell.activateById can collapse the side panel, which is not the expected behavior most of the time.

References

Fixes (again) #7147
Fixes #7534
Fixes #7790 (comment)
Related to jupyterlab/jupyter-chat#105 (comment) (workaround at https://github.com/jupyterlab/jupyter-chat/blob/5b4040e83374470375eb090683f4850f9df7dd2d/packages/jupyterlab-chat-extension/src/index.ts#L697-L699)

Code changes

• Revert Fix toggle functionality for widgets. #7178
• Add some method in shell to:
  • get the area of a widget
  • check if a side panel is visible from area
  • expand a panel from area
  • collapse a panel from area
• Add a plugin to override the upstream menu items "Table of Contents" and "Debugger Panel" to toggle the panels instead of activating them.

User-facing changes

Do not hide a side panel when using shell.activateById() anymore.

Backwards-incompatible changes

None

[github-actions]

👈 Launch a Binder on branch brichet/notebook/fix_sidepanel_activate

[brichet]

I wanted to replace the menu item or the command relative to the TOC and the debugger, with a commands toggling the side panel.
But I couldn't find a way to disable (using public API) a core command from an extension, or to remove an item.

Perhaps fixing #7147 should be done upstream in Jupyterlab, by changing the commands to toggle instead of activate ?

[brichet]

I tried unsuccessfully to replace the upstream shortcuts, but it seems to also disable the new shortcuts

"jupyter.lab.shortcuts": [
    {
      "command": "toc:show-panel",
      "disabled": true,
      "keys": ["Accel Shift K"],
      "selector": "body"
    },
    {
      "command": "toc:toggle-panel",
      "keys": ["Accel Shift K"],
      "selector": "body"
    },
    {
      "command": "debugger:show-panel",
      "disabled": true,
      "keys": ["Accel Shift E"],
      "selector": "body"
    },
    {
      "command": "debugger:toggle-panel",
      "keys": ["Accel Shift E"],
      "selector": "body"
    }
  ]

[brichet]

I wanted to replace the menu item or the command relative to the TOC and the debugger, with a commands toggling the side panel. But I couldn't find a way to disable (using public API) a core command from an extension, or to remove an item.

Perhaps fixing #7147 should be done upstream in Jupyterlab, by changing the commands to toggle instead of activate ?

Finally the menu item can be disabled from the settings.
Thanks @jtpio for the tip.