[FEATURE IDEA] Add UI to show action if `run_if` is specified

[topher-lo]

Why

• It's hard to tell if a node has a conditional attached unless you select the node or gave it a meaningful title

Suggested solution

• Add a greenish #C1DEAF border that shows up around the node
• Prompt the the user to give the "condition" a human-readable name (why? because the expression will probably be too long)
• If no human-readable name is given. Take the last .attribute and operator value part of the expression as the condition name.