omit versions in Sauce browser config; no explicit version implies latest version
Merge pull request #11934 from twbs/auto-latest-browsers

omit versions in Sauce browser config; no explicit version implies latest
typo fix: replaced 'model-open' with 'modal-open'
Merge pull request #11935 from tlindig/tl_fix_typo_modal-open

Docu: typo fix: replaced 'model-open' with 'modal-open'