Animation Event can't drag together in the animation editor with 4.5.2

When I created several animation events in animation editor, I can’t drag them together.
Before 4.3.0, it is possible, and maybe it is a new bug with animation editor.

It takes super headache for me when I just want a little delay for lots of events, I must drag the event one by one this time…

Hello Please Unity Support fix it new version

Anyone who could help with this problem ?