Improvement: refine UI input method contracts & component documentation#11707

GitHamo wants to merge 2 commits into

ILIAS-eLearning:trunkILIAS-eLearning/ILIAS:trunkfrom

GitHamo:improvement/declare-methods-in-ui-component-interfacesGitHamo/ILIAS:improvement/declare-methods-in-ui-component-interfacesCopy head branch name to clipboard