‘Fixing’ verbose volume updates in https://bugs.launchpad.net/recent-notifications

gistfile1.txt

Before I realised recent-notifications had a denylist (dconf net.launchpad.indicator.notifications.blacklist ['indicator-sound']),
had created this patch to work around a bug in 15.10 indicator-sound:

bzr+ssh://bazaar.launchpad.net/+branch/recent-notifications/indicator/
```
--- src/notification.c	2015-10-23 21:51:59 +0000
+++ src/notification.c	2018-11-08 15:55:07 +0000
@@ -150,6 +150,10 @@
     g_variant_unref(value);
     value = NULL;
 
+	/* work-around bug in old indicator-sound setting X_CANONICAL_PRIVATE_SYNCHRONOUS to true */
+    if((g_strcmp0(self->priv->app_name, "indicator-sound") == 0)) {
+      self->priv->is_private = TRUE;
+	}
     if((g_strcmp0(private_string, "volume") == 0) ||
        (g_strcmp0(private_string, "brightness") == 0) ||
        (g_strcmp0(private_string, "indicator-sound") == 0)) {
```

As the notifications for volume changes aren’t setting an application value for
x-canonical-private-synchronous, recent-notifications does not hide the notice.

```
method call time=1542028476.217358 sender=:1.49 -> destination=:1.67 serial=52 path=/org/freedesktop/Notifications; interface=org.freedesktop.Notifications; member=Notify
   string "indicator-sound"
   uint32 0
   string "audio-volume-high"
   string "Volume"
   string ""
   array [
   ]
   array [
      dict entry(
         string "x-canonical-non-shaped-icon"
         variant             string "true"
      )
      dict entry(
         string "x-canonical-value-bar-tint"
         variant             string "false"
      )
      dict entry(
         string "x-canonical-private-synchronous"
         variant             string "true"
      )
      dict entry(
         string "value"
         variant             int32 94
      )
   ]
   int32 -1
```