make Default::Get actauly work
simplify Default::Set()
fix ReadBool()
add shorter name to access slConfig: cfg()
move settings setup from springlobbyapp to settings

set defaults using SLCONFIG()
FIXME: useractions can not be setup in settings
slconfig: from settings move helper methods to show/count sub entries
settings: move methods concerning useractions to useractions
remove unused setting /General/SelfUpdateDisabled

it was never set anywhere and determines only if
the menu point "check for new version" is visible
settings: cleanup unused variables
settings: remove *AutoUpdate methods, show intended use of SLCONFIG()