Fix next indicator texture not being loaded (#1724)

fixes # 1720

addons/dialogic/Modules/Text/node_next_indicator.gd

@@ -13,14 +13,19 @@ extends Control
 ## What animation should the indicator do.
 @export_enum('bounce', 'blink', 'none') var animation := 0
 ## Set the image to use as the indicator.
-@export var texture := preload("res://addons/dialogic/Example Assets/next-indicator/next-indicator.png")
+@export var texture := preload("res://addons/dialogic/Example Assets/next-indicator/next-indicator.png"):
+	set(_texture):
+		texture = _texture
+		if has_node('Texture'):
+			get_node('Texture').texture = texture
 
 
 func _ready():
 	add_to_group('dialogic_next_indicator')
 	# Creating texture
 	if texture:
 		var icon := TextureRect.new()
+		icon.name = 'Texture'
 		icon.ignore_texture_size = true
 		icon.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
 		icon.size = Vector2(32,32)