Can add pins to nodes during PIE

Pins can be added to blueprint nodes during read only modes, such as PIE.

1. Open Editor (any project)
2. Open MyCharacter Blueprint
3. Add Sequence node to event graph
4. Compile, save, play in editor
5. Go to event graph while in PIE, press "add pin" to sequence node

4.7p5 Can add pins while blueprint is in read only mode