[BUG] It's easy to lost the changes on the edit snippet dialog

[ngosang]

Describe the bug
It's easy to lost the changes on the edit snippet dialog. When you click out of the dialog all changes are gone.

To Reproduce

Expected behavior
You should prevent closing the dialog when you click outside the dialog. This is fine when you are "viewing" the snippet, but dangerous when you are editing. The user should click in "close" or "save".