Support loading multiple tray icons

v2/pkg/menu/trayoptions.go

@@ -7,8 +7,20 @@ const (
 	TrayLabel TrayType = "label"
 )
 
+// TrayOptions are the options
 type TrayOptions struct {
-	Type  TrayType
+	// Type is the type of tray item we want
+	Type TrayType
+
+	// Label is what is displayed initially when the type is TrayLabel
 	Label string
-	Menu  *Menu
+
+	// Icon is the name of the tray icon we wish to display.
+	// These are read up during build from <projectdir>/trayicons and
+	// the filenames are used as IDs, minus the extension
+	// EG: <projectdir>/trayicons/main.png can be referenced here with "main"
+	Icon string
+
+	// Menu is the initial menu we wish to use for the tray
+	Menu *Menu
 }