UI: changes sorting icon in search page
UI: record briefs update in "collection" pages
UI: record_brief width FIX after filtering

* ( addresses #372)
UI: generalises box-type styling across pages

* creates new “general.css”
* changes box-type styling in “GetStarted” pages to look like “About”
pages
* creates experiment specific pages for “Get Started”
ALICE: creates "Get Started" page

* (closes #355)