Remove 'back' button from send/receive credentials page (#1749)

Author: laineyhm

src/angular-app/languageforge/lexicon/new-project/send-receive/new-project-credentials.component.ts

@@ -99,7 +99,7 @@ export const NewProjectSendReceiveCredentialsState = {
     step: 1,
     isSRProject: true,
     show: {
-      backButton: true,
+      backButton: false,
       nextButton: true,
       step3: false
     },