Feature: Indicate and modify upstream nk2dl_metadata from within the panel

[artandmath]

• Indicate in the node table whether there is up stream metadata that will be used when submitting the node to deadline.
  • Indication could be color/italics/bold.
  • Indication would be active only if "use_metadata" is enabled in the extra settings
• If indication is active, allow for editing of the metadata from the node table, or at the very least clicking the cell will reposition the node graph to the upstream meta data node.