Uncrustify sources

Ran `find src plugins -iname '*.[c|h]' -print0 | xargs -0 uncrustify --no-backup`
with some minimal manual intervention.

src/calls-settings.c

@@ -47,7 +47,7 @@ enum {
 static GParamSpec *props[PROP_LAST_PROP];
 
 struct _CallsSettings {
-  GObject parent_instance;
+  GObject    parent_instance;
 
   GSettings *settings;
 };