Json file are not indented properly

indentation of json files in Qt-Creator does not work properly. Indentation does not follow the contents' hierarchy.

1. Opening a curly brace does not add the relative closing one as for cpp files.
2. A carriage return after an opened curly brace should indent with an additional tab

E.g. current

{
"foo" : "bar"

desired:

{
   "foo" : "bar"

 3. A double carriage return goes back to the first column of the file.

 4. Auto-indent hotkey is broken and completely removes any preexisting indentation.