Conflict with rgthree seed node

[mech-tools]

Hello,

When NestedNodeBuilder is enabled (even if no node is nest in the workflow), the "seed (rgthree)" node does not work as it should.

When using "seed (rgthree)" in the standard way (i.e. changing seed at each generation), clicking on the "load" button in the history should redisplay the workflow with the seed used in the editable field.

However, with NestedNodeBuilder enabled, the seed always remains locked at -1.

Here's a workflow: simply click several times on the "Queue Prompt" button, then load a completed generation in the history to see that the seed remains locked at "-1" when it should display the seed used for that particular generation. workflow.json