CiviHR: Test new UIs in Internet Explorer

Where quick/reasonable, also try to fix. If there are significant individual issues, they can be broken out it into other tickets.

(Note: Based on past experience, it's likely that one will encounter multiple bugs which are big in impact but small in implementation – e.g. an extra "," at the end of a list is OK in Firefox but can cause the entire to fail in IE. These make it hard for a non-developer to test. It's most effective if the person testing also has the power to fix the bugs as they go along.)