Refactored a lot of stuff.

Added property lists.
Renamed FileAdapter to FileSystemAdapter.
And more smaller stuff.

scenes/property_list/scripts/header.gd

@@ -0,0 +1,19 @@
+extends Control
+
+var label := "" setget _set_label, _get_label
+var texture : Texture = null setget _set_texture, _get_texture
+
+#####################
+# setters & getters #
+#####################
+func _set_label(label_ : String) -> void:
+	$header_info/label.text = label_
+
+func _get_label() -> String:
+	return $header_info/label.text
+
+func _set_texture(texture_ : Texture) -> void:
+	$header_info/texture.texture = texture_
+
+func _get_texture() -> Texture:
+	return $header_info/texture.texture

scenes/property_list/scripts/property_label.gd

@@ -0,0 +1,19 @@
+extends Control
+
+var label := "" setget _set_label, _get_label
+var texture : Texture = null setget _set_texture, _get_texture
+
+#####################
+# setters & getters #
+#####################
+func _set_label(label_ : String) -> void:
+	$label.text = label_
+
+func _get_label() -> String:
+	return $label.text
+
+func _set_texture(texture_ : Texture) -> void:
+	$texture.texture = texture_
+
+func _get_texture() -> Texture:
+	return $texture.texture