Fix "confirm on new page creation" can not be cancelled

Return in super() does not stop execution of child class method. Fix
by set a variable, when the confirmation was cancelled and check this var
in child method.

Bug: 69813
Change-Id: I3ae0ca71b2c4ef481a186a0b128f23c188b8cc55
Merge "Fix "confirm on new page creation" can not be cancelled"