1) What is that black circle icon about ? why not something based on HQL and Critiera icon ?

2) If I have changed the orgiinal file and then save the query it first ask me if I want to replace and then it tells me with a new dialog it can't.
Why did it ask me in the first place then ?

3) The dialog that asks about asking before and after is in a dialog that grows very big if the query is big. Couldn't we use the normal "show difference dialog" ?