Fixups for editor support classes for content browser code.
#jira UE-161932
#rb jason.stasik,jamie.dale
#preflight 631bd2a0d31788ea3ac03570
[CL 21935588 by robert millar in ue5-main branch]
#jira
#rb none
#rnx
#ROBOMERGE-SOURCE: CL 13006995 via CL 13007016 via CL 13007026 via CL 13007030
#ROBOMERGE-BOT: RELEASE (Release-Engine-Staging -> Main) (v682-12900288)
[CL 13007036 by jamie dale in Main branch]