ui: Add reusable classic-style popup foundation#1940

DevOpsOfChaos wants to merge 2 commits into

Return-To-The-Roots:masterReturn-To-The-Roots/s25client:masterfrom

DevOpsOfChaos:sidequest/generic-popup-foundationDevOpsOfChaos/s25client:sidequest/generic-popup-foundationCopy head branch name to clipboard