Fix two bugs in environments table

What does this MR do?

It fixes two bugs:

• The hovers on truncated job names in the environments table were not displaying. This fixes that.
• It also fixes an error that's being thrown in master on a container class, which was breaking hovers in Firefox.

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Code review guidelines
• Style guides

Availability and Testing

• Tested in all supported browsers