I hope Dialogs can customize the mount DOM location

[490626721]

Is your feature request related to a problem? Please describe.
At present, I have a Vue TinyMce completed in Popover, but Dialogs are mounted under the body, which will cause Popover to unexpectedly close when I click on functions such as uploading images

Describe the solution you'd like
I hope to specify the DOM where Dialogs are mounted

Describe alternatives you've considered
I don't have a good idea either. Modifying the popover in the current project would be a bit complicated

[TinyITAdmin]

Ref: INT-3220