A simple tool to edit the label knob, without need to enter on the properties panel of the node.
With a specific options for some kind of node.
Shortcut: shift + q
Backdrops: label, font size, order and icon

Sticky Note: label, font size, alignment and icon

Dots: label, font size and icon

Channel Merge: label, operation and bbox

Merge: label, operation and bbox

For any other kind of node, only label is available

Download here.
To install, just edit your menu.py with this text:
import smartLabel
and copy the smartLabel.py to your .nuke folder.
You can find your .nuke folder at:
Linux: /home/login name/.nuke
macOS: /Users/login name/.nuke
Windows: drive letter:\Users\user name\.nuke