first_layer_extrusion_width not available to override on a per part basis

[kevenwyld]

NOTE: I'm using the pre-release build

Describe the bug
Some newer settings such as first_layer_extrusion_width among others are not available from the instance overrides (?? not sure what to call it, but where you can add settings to a particular part instance to adjust them just for that part).

So for example if I'd like to test the performance of various layer widths with multiple parts I can't override that particular setting but I can override other ones like infill_extrusion_width.

To Reproduce
Steps to reproduce the behavior:

1. Import a part
2. Click on it's name in the instance list on the right
3. Click the editing icon
4. Click "add setting"
5. Click "Width _Flow"
6. Look for "First Layer Width" which is missing

>> Project File <<
For this example I just used the bed leveling strips and added a few custom infill widths.
patch_layer_width.zip

Expected behavior

I suppose the expected behavior would be for settings available in the override dialogue to be a complete list of settings available in the print/filament/printer settings panels. That might be a bit unrealistic though since I'm sure there are reasons that some of them are not available. It's also out of scope for this bug report. I'm only concerned with this particular setting at this time.

If there is another issue I didn't see that includes this request please feel free to close this.

Screenshots

Desktop (please complete the following information):

• OS: Linux
• Version 2.3.56.1

Additional context
I also have "complete individual objects" turned on so I would expect "first layer" to refer to the first layer of each object. Maybe I'm not understanding this correctly though. If that's the case I can see why it might not be available in this menu.

[kevenwyld]

@supermerill I see you made a commit addressing this issue but I don't see the setting in Width and Flow on an object. Am I looking in the wrong place? I'm on Version 2.3.56.6 .

EDIT: Never mind I found it and I'm apparently blind =]

Thanks so much for all your excellent work! You clearly have put a huge amount of time into this project. We (the community) very much appreciate your efforts.

[kevenwyld]

I tested and things look good to me so I'll close this issue.