LPS-37508 Label and input are not aligned in inline fields

JIRA: https://issues.liferay.com/browse/LPS-37508

Old PR: https://github.com/blzaugg/liferay-portal/pull/102
Issue still present after this commit liferay@49cbbd9

This new PR is synced with liferay:master

Tested on Chrome, Firefox, IE 9 10 11

Changes are made in `themes/classic/_diffs/css/custom_common.css`