Sliding N Terminal on FOR Loop and/or Progress Terminal

[smmarlow]

Since I got the proverbial hook on the pervious progress terminal for a FOR loop, I thought I would take another stab at it.  Should the N Terminal be sliding along the front border of the structure?  And even though it fell flat, I still like my progress terminal, albeit with a more appropriate symbol.

[JackDunaway]

Similar proposal: Allow Timeout Terminal on Event Structures to Move (and for completeness, the Count Terminal of For ...

[smercurio_fc]

The progress terminal is just a repost of the previous idea. The discussion for that should be kept in the other idea thread so it's all in one place.