Fix "edit without login" link message

Change message mobile-frontend-editor-anon to "Edit without
logging in".

Follow up: I8ec64e0255b93195289ec7a76a6df4ce166f6f8d

Change-Id: I1e5c102b7f2a6e1249af9896a25a0407cf257350
Merge "Fix "edit without login" link message"