Don't make the window disappear when the user clicks outside of this window

Steps to reproduce

1. Click to create a new event
2. Start to enter infos
3. Click on the time selector (or just go to the 4.)
4. Click somewhere before clicking on minutes selector (on the whole event window or somewhere on the page) to close the time selector
5. Rage seeing the whole event's window disappear (full of fresh-new infos)

Expected behaviour

Don't make the event's popup disappear when the user clicks outside of this window : it may results in crisis when you just entered for the third time all informations about the event you want to create in your planning.
Maybe the event could be saved as draft... or even created

Actual behaviour

When an user click outside of the event's window, this window just disappear, while the user had already fill some fields.

Calendar version: (see the apps page)
1.6.1

Client configuration

Firefox / Chrome

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