Settings: folder/workspace settings tab should hide settings that cannot be applied

[bpasero]

Refs: #50496

When I click on folder or workspace settings, I always seem to be seeing all settings. But some settings (like update.channel) cannot be applied in any other scope and so should not be visible.

[octref]

Presentation wise I suggest greying those setting out and have a hover-tip that explains it.
Main motivation is with search I still want to see all matches.

[roblourens]

Yeah I can match the current editor by hiding them, or do something else. We can cover this in our user study around settings scope issues.

[octref]

@roblourens Currently failed edit still successfully updates the GUI. But I guess you can address that together with this issue:

[bpasero]

This is very broken now.

Scenario 1:

• open settings
• click "Workspace"
• search for "Window"
• click on "Window" settings in the tree
• click on "User"

=> workspace settings still showing

Scenario 2:

• open settings
• click on "Window" settings in tree
• search for "Window"
• click on "Window" settings in tree
• click on "Workspace"

=> all "User" settings show up even though I clicked "Workspace"

[roblourens]

Fixed with #57352

[bpasero]

@roblourens ok works better now, the selection in the TOC is still lost when switching between user and workspace setting.