Fix unloading via CLI (-u)

Squashed commit of the following:

commit 19532d64a7f7337da7f844d52198417ceaf60e80
Author: lawl <github@dumbinter.net>
Date:   Thu Feb 4 10:40:27 2021 +0100

    Fix unloading paClient for UI

commit 66ece81e17589988f92059b44b2659fdca0c4ca1
Merge: 1c97cfe 60d06f2
Author: lawl <github@dumbinter.net>
Date:   Thu Feb 4 10:36:13 2021 +0100

    Merge branch 'fix_cli_unload' of git://github.com/hador/NoiseTorch into hador-fix_cli_unload

commit 60d06f25aa
Author: andreafa <andreafa@amazon.com>
Date:   Thu Feb 4 08:51:48 2021 +0000

    Fix cli unload (-u).

    The findModule method in module.go requires a valid paClient to be
    populated in the context object.
    Added logging if unloadSupressor fails when called via the -u CLI flag.

main.go

@@ -107,6 +107,8 @@ func main() {
 		os.Exit(1)
 	}
 
+	ctx.paClient = paClient
+
 	if list {
 		fmt.Println("Sources:")
 		sources := getSources(paClient)
@@ -133,12 +135,15 @@ func main() {
 	}
 
 	if unload {
-		unloadSupressor(&ctx)
+		err := unloadSupressor(&ctx)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error unloading PulseAudio Module: %+v\n", err)
+			os.Exit(1)
+		}
 		os.Exit(0)
 	}
 
 	if loadInput {
-		ctx.paClient = paClient
 		sources := getSources(paClient)
 
 		if sinkName == "" {
@@ -165,7 +170,6 @@ func main() {
 
 	}
 	if loadOutput {
-		ctx.paClient = paClient
 		sinks := getSinks(paClient)
 
 		if sinkName == "" {
@@ -192,6 +196,9 @@ func main() {
 
 	}
 
+	ctx.paClient.Close()
+	ctx.paClient = nil
+
 	if ctx.config.EnableUpdates {
 		go updateCheck(&ctx)
 	}