Update the drupal-css #drupal-off-canvas selector to #drupal-off-canvas-wrapper

[kedarkhaire]

Is your feature request related to a problem? Please describe

Off-canvas / Settings Tray CSS refactored to use modern CSS
Any CSS that is specifically targeting the off-canvas, will likely need to change. CSS targeting the off-canvas usually includes #drupal-off-canvas in the selector.

Describe the solution you'd like

A clear and concise description of what you want to happen.To target the Drupal 10+ version of off-canvas, use the following selector:

#drupal-off-canvas-wrapper {
}

This selector is new, and also includes the off-canvas title bar element as a descendent.