Special cases of node.context.*

[mhsdesign]

• migrate node.context.currentSite to eel helper to fetch site entity
• migrate node.context.workspace to eel helper to fetch workspace, but attention, the workspace api in fusion also changed.
• warn if anything else is accessed by node.context.*
• while the renderingMode has a basic migration via TASK: Adjust migration for renderingMode.isEdit #22, but the not all things are migrated currently
  • node.context.workspace.name == 'live' -> !renderingMode.isEdit
  • node.context.workspace.personalWorkspace -> renderingMode.isEdit
  • node.context.currentRenderingMode.* -> renderingMode.*