I'm not sure how this screenshot helps, but here it is.
Steps to reproduce:
1) start glade-3
2) create a new window
3) put a label in it
4) cut the label to the clipboard
5) open the clipboard window
6) right-click and choose delete
Expected outcome: item removed from clipboard window widget list
Actual outcome: nothing happens
I'm not sure how this screenshot helps, but here it is.
Steps to reproduce:
1) start glade-3
2) create a new window
3) put a label in it
4) cut the label to the clipboard
5) open the clipboard window
6) right-click and choose delete
Expected outcome: item removed from clipboard window widget list
Actual outcome: nothing happens