Adjust pv::toolbars::SamplingBar to GVariant-based sr_config_* functions
Adjust pv:prop::Enum to GVariant-based sr_config_* functions
Make pv::prop objects run on GVariants
Ported pv::prop::binding::DeviceOptions to GVariants
Added Bool property and bound to SR_CONF_RLE
Removed an uneeded include
Added Int property and bound to SR_CONF_CAPTURE_RATIO
Moved get_property_form out of pv::prop::binding::Binding
Padded data buffer so that reads do not overrun it.
Enum now allows the no-selection condition