[BITV] Focus of search suggestions is not clearly visible, needs border instead of background

[Pytal]

• Add keyboard focus border for dropdown options sagalbot/vue-select#1744 Using fork https://github.com/nextcloud-deps/vue-select
• Add keyboard focus border for dropdown options vue-select#3
• v3.21.2 vue-select#8
• Add keyboard focus border to select options #3711
• v7.6.0 #3755
• Bump @nextcloud/vue from 7.5.0 to 7.7.0 and add node-polyfill-webpack-plugin nextcloud/server#36813
• [stable25] Bump @nextcloud/vue from 7.5.0 to 7.7.0 and add node-polyfill-webpack-plugin nextcloud/server#36841