HttpGet used to use QHttp which has been deprecated since a while and has been
removed from Qt5. Rewrite the class based on QNetworkAccessManager which is the
recommended way these days.
Change-Id: I4902309c433a85ec18e157ef3a9f5e60fd0f4b1f
Offline Mode was intended to allow performing an installation without network
access. However, to get the required files cached the same installation has to
be performed with network access, which is a rather strange prerequisite. A
better way would be a way to direct Rockbox Utility to some local "repository"
that holds the required files.
Furthermore, Offline Mode hasn't been tested since long and is likely to be
broken since the caching mechanism has been extended.
For now remove this functionality. As far as I know it's been rarely used (if
at all) anyway.
Change-Id: Ib2af4892708e0440bd0a7940c131f04182ddb39a
This function returns an internal enum value of QHttp (which is also
deprecated). It was only used for showing an error to the user / showing it in
the system trace. Since it is an enum value it doesn't have much value. Log /
show the error string instead.
Change-Id: I54b9b6026969f8108f779b02a04477f0ad9201ab
