Pressing tab key does not activate the menu

there’s a script in your theme that adds the class “non-keyboard-outline” to the toolbar button and because of that the tab order miss parts. can you please tell me where this script come from? maybe I could find a solution for this conflict.

I am using the karma wordpress theme by truethemes.net . it is advertised as an accessible theme and sold on envato market https://themeforest.net/item/karma-responsive-wordpress-theme/168737?s_phrase=&s_rank=4

I will try to optimize the plugin to this theme. thank you for letting me know.