Allow to have scoped instantiation service per editor slot

[bpasero]

For:

• scoped keybinding service
• scoped progress service

For the title area and the editor itself. This requires a common parent (or the editor-container itself) to be reparented instead of the editor moving around.

Enables more scenarios around menu and command contributions for contexts.

[bpasero]

@jrieken I merged this to master: title container, editor container, progress bar widget and the instantiation service are now within a new container that gets reparented when a) you move an editor around or b) you close editor group LEFT when LEFT | RIGHT exist and RIGHT becomes LEFT as well as for when you have 3 editors open and you close the left or center group.

Is there a way to verify this works for the scenario you disabled late before we finished June milestone? I remember you reverted a commit and I am not sure if this can be now reverted back again.

[jrieken]

I can verify

[jrieken]

LGTM - will push the revert revert commit

[Tyriar]

Verified via #9693