Merge branch 'dd_lightbar_menu_substrWithAttrCodes_refactor_and_additional_nav_keys' into 'master'

dd_lightbar_menu.js: Refactored substrWithAttrCodes() to fix issues with it. Added mechanisms to have additional keys for page-up, page-down, first page (HOME), and last page (END), similar to the additional quit keys.

See merge request !343