Small changes to backlight

backlight/backlight.lua

@@ -31,7 +31,7 @@ function P:_update_widget()
 	end
 
 	self.widget:set_value(self.brightness);
-	self.widget:set_tooltip("Backlight " .. self.brightness .. "u");
+	self.widget:set_tooltip("Backlight " .. math.floor(self.brightness) .. "%");
 	self.widget:set_state("ready")
 end
 
@@ -90,7 +90,7 @@ function P:new(args)
 	-- Arguments
 	b = {
 		update_interval = args.update_interal or 5,
-		min_value = args.min_value or 0,
+		min_value = args.min_value or 1,
 		max_value = args.max_value or 100,
 		widget_type = args.widget_type or "arc",