ID 385221 - Backdrop items show incorrect dimensions/do not show dimensions when using the dimensions tool

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Problem summary
Backdrop items show incorrect dimensions/do not show dimensions when using the dimensions tool. When using the "add dimensions" option in the display properties, the dimensions are offset and do not take into account the pixel size setting or the image still.

Customer reported version
modo.12.2v1

Customer reported platform
windows10

Steps to reproduce
1) Open Modo.
2) Select Add Item > Backdrop in the item bin.
3) Select View > Dimensions tool.
Result: No dimensions will be visible.
4) On the Backdrop item, select Image > Add Clip > Load image and load an image.
5) Select Display > Add Dimensions in the item properties.
Result: Dimensions shown will be offset and incorrect relative to the image size.

Workaround
The image size is equal to the resolution multiplied by the image's resolution.

Reproduced by support
This bug has been reproduced in:
12.2v2 - Windows 10, OSX 10.13.5
12.1v2 - Windows 10
12.0v1 - Windows 10
11.2v3 - Windows 10
11.2v1 - Windows 10
11.1v1 - Windows 10
11.0v3 - Windows 10
10.2v4 - Windows 10, OSX 10.13.5

Earliest version tested
10.2v4 - Windows 10, - This issue appears to be in all versions of the product

Expected behaviour
Dimensions tool should show the size of backdrops and other similar items.

Actual behaviour
The dimensions tool does not work with backdrops or other non-mesh items.

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