Editor: Subflow input labels don't display in Editor UI

[gdvine]

Current Behavior

One can set input labels in subflow properties > Appearance tab, but they're not visible in the Editor UI like output labels are.

Expected Behavior

Input labels are visible in the Editor UI similar to how output labels are displayed.

Steps To Reproduce

1. Open any subflow with an input.
2. Add an input label in properties > Appearance and click Done.

Example flow

simple to reproduce

Environment

• Node-RED version: 4.1.0
• Node.js version:
• npm version:
• Platform/OS: macOS
• Browser: Chrome