Refactor and copy editing

Fix instances of leftover React.PropTypes #1189
Split out space roles into own property for user #1190
Fetch Services and Plans once in component #1191
Don't show old login screen when user is not authed #1193
fix space user from automatically being populated upon invite #1194
flatten associated users roles #1195
changed wording on invite existing user selector #1196
Create default text for specified services with multiple required params #1197
Break out service_instance_table_row component #1198
New button text around multiple param service instances #1199
Adjust copy explaining org users #1200
Revert "[Snyk] Fix for 10 vulnerable dependency paths" #1201
Add user check org org manager #1202
Fix display button on multi param plans #1203
remove disabled coveralls #1204
updated copy on user roles #1205
Remove the alpha link in the top nav #1208