Enable Custom Styles on Secondary Windows?

[Eunomiac]

VSC is slowly improving its support for multi-monitor workspaces with better handling of new windows (via File → New Window or CTRL-SHIFT-N), including them in the saved session data so they're restored when reopening your workspace, but

Problem: Custom styles (and scripts) are only added to the DOM of the first/main VSC window. The separate DOM trees of additional windows aren't currently being modified by the extension.

Expected Behavior: Styles and scripts should apply equally to all opened windows of a VSC instance (or a setting should permit enabling this, if making it default behavior risks messing with users' customizations)