The new modal dialog breaks delete content type functionallity.

When pressing Ok the action is never performed and navigation to undefined page is taking place.

Let me check this one
I am also seeing this error on dev branch. To replicate: create a site based on blog theme and then go and try to delete the article content type.
I can reproduce the issue, I'm trying to find a better way to cleanup the javascript code and make the bootstrap modal synchronised
@sebastienros it seems, that because of my comment, GitHub closes both issues, when you have closed #3724. This one should remain open.
No, I merged the fix
@lukaskabrt this is caused by bootstrap confirm dialog
@hishamco

Don't blame me .. nowadays I'm working with a very slow Internet 馃槉
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@hishamco