UI update to search area of distiller

[bpdesigns]

• [x] rename first dropdown to read "parent agency (required)"
• [x] change color of "(required)" to gray
• [x] change type of "(required)" to italic
• [x] stack all the dropdowns and have them all have the same width. (mimicking the mobile view)
• [x] center dropdowns.
• [x] update text of "Include audits where parent agency is cognizant/oversight" to say "Only show audits where parent agency is cognizant/oversight"
• [x] remove "Include audits with findings for specified agency" (we'll place this on the findings page)