Twenty Thirteen: fix layout issue with search form in older versions of Safari and Android. Fixes #24192, props iljoja.

git-svn-id: https://develop.svn.wordpress.org/trunk@28662 602fd350-edb4-49c9-b593-d223f7449a82
Twenty Fourteen: apply `.widget` input and textarea styles only if they are inside `.widget-area`. Props jesin, fixes #27677.

git-svn-id: https://develop.svn.wordpress.org/trunk@28663 602fd350-edb4-49c9-b593-d223f7449a82