Update qjackctl to version 0.5.5
The following changes have been made since 0.5.4:
- Old deprecated Qt4 build support is no more.
- Graph port sort options added as View / Sort menu.
- System tray options now subject to current desktop environment availability.
- Also disable Setup / Misc / Other / Save JACK server configuration to (.jackdrc) when JACK D-Bus interface is enabled.
- Whether to use server synchronous mode option added to Setup / Settings / Parameters (only applied when JACK D-BUS interface is enabled).
- Disable some Setup / Settings / Advanced parameters when JACK D-Bus interface is enabled and vice-versa.
- Attempt to power-cycle JACK D-Bus service on demand;
- Marked as probably useless anyway, old "H/W Monitor" option (-H) is now being ditched from Setup / Settings / Advanced tab.