Improved warning shown when autoload cannot be added.

(cherry picked from commit 58caa2c453bed12c9249e7696406775dfa135a9e)

editor/editor_autoload_settings.cpp

@@ -669,18 +669,18 @@ bool EditorAutoloadSettings::autoload_add(const String &p_name, const String &p_
 
 	String error;
 	if (!_autoload_name_is_valid(name, &error)) {
-		EditorNode::get_singleton()->show_warning(error);
+		EditorNode::get_singleton()->show_warning(TTR("Can't add autoload:") + "\n" + error);
 		return false;
 	}
 
 	const String &path = p_path;
 	if (!FileAccess::exists(path)) {
-		EditorNode::get_singleton()->show_warning(TTR("Invalid path.") + "\n" + TTR("File does not exist."));
+		EditorNode::get_singleton()->show_warning(TTR("Can't add autoload:") + "\n" + TTR(vformat("%s is an invalid path. File does not exist.", path)));
 		return false;
 	}
 
 	if (!path.begins_with("res://")) {
-		EditorNode::get_singleton()->show_warning(TTR("Invalid path.") + "\n" + TTR("Not in resource path."));
+		EditorNode::get_singleton()->show_warning(TTR("Can't add autoload:") + "\n" + TTR(vformat("%s is an invalid path. Not in resource path (res://).", path)));
 		return false;
 	}