fallback tuner: have isPlayable return magic number 2 for services
that cannot be played locally (when fallback tuner is selected).

This is a preparation for skin support to come.
cosmetic: db.cpp: consistent coding style.
fallback tuner: skin support for remote services.

Signed-off-by: Erik Slagter <erik@openpli.org>
fallback tuner: Tiny optimisation on previous commit
0b3c94fbc52e5378d2569d6baccfbade3d7a01bd.
[ChannelSelection] Add condensed showSatellites list
Add Terestrial, Cable and Current Transponder on top of satellite list

And do not include it anymore in the sort.
fix name for fallback service reference
Do not use 'expensive' config to toggle condenced satellite lists

As I suggest this is not something that is required to remember on each
boot as you simply toggle between the modi.
sanity check for fallback service when is wrong service reference in bouquet

Signed-off-by: Erik Slagter <erik@openpli.org>
added error message for sanity check in fallback

Signed-off-by: Erik Slagter <erik@openpli.org>