Add labels to block element

Fixes #14083 


Before:![Screen_Shot_2016-04-04_at_11.22.27_AM](/uploads/c35afd95ebca1b72f2aa37c72dc3c1a9/Screen_Shot_2016-04-04_at_11.22.27_AM.png)

After: ![Screen_Shot_2016-04-04_at_11.21.34_AM](/uploads/94f180858cf8fe2fc7eeec541ce66d44/Screen_Shot_2016-04-04_at_11.21.34_AM.png)

See merge request !3492