Ignore hidden files and directories in find in files

(cherry picked from commit aeff87686859f5b6d9fde42c2e3cb12fcc2f4adc)

editor/find_in_files.cpp

@@ -235,9 +235,11 @@ void FindInFiles::_scan_dir(String path, PoolStringArray &out_folders) {
 		if (file == "")
 			break;
 
-		// Ignore special dirs and hidden dirs (such as .git and .import)
+		// Ignore special dirs (such as .git and .import)
 		if (file == "." || file == ".." || file.begins_with("."))
 			continue;
+		if (dir->current_is_hidden())
+			continue;
 
 		if (dir->current_is_dir())
 			out_folders.append(file);