This fixes the wrong value for path() and fileName() when a
path or file name actually contains a '%'.
userInfo() and authority() are not individual getters, they combine
two or more fields, so full decoding isn't possible (e.g. username
containing a ':').
[ChangeLog][Important Behavior Changes][QUrl and QUrlQuery]QUrl now
defaults to decoded mode in the getters and setters for userName,
password, host, topLevelDomain, path and fileName. This means a '%'
in one of those fields is now returned (or set) as '%' rather than "%25".
In the unlikely case where the former behavior was expected, pass PrettyDecoded
to the getter and TolerantMode to the setter.
Change-Id: Iaeecbde9c269882e79f08b29ff8c661157c41743
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>