Use an empty string instead of null for reseting styles

* working on the left side

* flow direction working

* flow direction

* use menubar visibility to set setting

* hide titlebar on the web

* fix hover feedback

Fixes #80079

Updates our build to use TS 3.6. Fixes a few changes to dom apis and adds a monkey patch for the node typings break in 3.6

We seem to use the readonly property way of exposing these values more widely. Standardizing this a bit across the codebase