libtorc-baseui: Add a warning if SVG support isn't available
libtorc-baseui: Don't display settings that are entirely inactive
libtorc-core: Fix small leak in TorcPower
libtorc-core: Convert TorcNetwork to TorcSetting
libtorc-core: Remove Enable/DisableNetwork actions

- these are now triggered by the appropriate setting being changed
libtorc-audio: Upstream av sync fix