The trix editor seems to be overriding the html for the image height and width when populating from existing value

Steps to Reproduce

1. Create a trix editor and pre-populate it with html that includes an img that has a width and height.
2. Notice the trix editor creates the image and overrides the predefined height and width.

See jsfiddle here for example

I would expect it to not overwrite these properties if they are already set

Details

• Trix version: 1.2.0
• Browser name and version: Chrome 76
• Operating system: macOS Mojave