feat(registration): add email confirmation UI

New ConfirmEmailPage for users to verify their email and set password.
Resend form on registration and error pages. Registration form no
longer asks for a password. Confirmation requires a button click. The
admin list marks unconfirmed requests and offers only delete for them.

public/i18n/en.json

@@ -25,16 +25,27 @@
     "PASSWORD": "Password",
     "PASSWORD_CONFIRMATION": "Confirm password",
     "SUBMIT": "Create account",
-    "SUCCESS": "Registration sent. You get a mail as soon as the admin has decided.",
+    "SUCCESS": "We sent you a mail. Click the link in it to confirm your address and choose your password; only then does the admin see your request.",
+    "RESEND_EMAIL": "Email",
+    "RESEND": "Send the link again",
+    "RESEND_SENT": "If this address has an unconfirmed registration, a new link is on its way.",
     "HAVE_ACCOUNT": "Already have an account?",
     "ERROR_GENERIC": "Registration failed. Please try again.",
     "ERROR_EMAIL_IN_USE": "This email address is already registered.",
     "DISPLAY_NAME": "Display name (optional)",
     "ERROR_DISPLAY_NAME_IN_USE": "This display name is already taken.",
     "ERROR_TOO_MANY_ATTEMPTS": "Too many failed attempts. Please try again in {{minutes}} minutes.",
-    "INTRO": "An admin checks each new account. You get a mail as soon as yours is decided.",
+    "INTRO": "You get a mail with a link: there you confirm your address and choose your password. Then an admin checks your account and you get a mail with the decision.",
     "ERROR_PENDING_LIMIT": "Too many registrations wait for the admin right now. Please try again later."
   },
+  "CONFIRM_EMAIL": {
+    "TITLE": "Confirm your email address",
+    "INTRO": "Choose a password to confirm the address of your registration.",
+    "SUBMIT": "Confirm",
+    "DONE": "Your address is confirmed. An admin checks your request; you get a mail as soon as it is decided.",
+    "INVALID": "This link is unknown, already used or older than 24 hours. Request a new one:",
+    "TO_LOGIN": "Log in"
+  },
   "SETTINGS": {
     "PROFILE_STYLE": "Profile look",
     "PROFILE_STYLE_HINT": "How visitors see your public profile. Your own app look stays as it is.",
@@ -561,6 +572,11 @@
     "DENY_TITLE": "Deny {{email}}?",
     "DENY_TEXT": "The user gets a mail and cannot log in. The request is removed for good after 30 days.",
     "DONE_ACCEPT": "Registration accepted",
+    "UNCONFIRMED": "Not confirmed",
+    "DELETE_UNCONFIRMED_TITLE": "Delete {{email}}?",
+    "DELETE_UNCONFIRMED_TEXT": "The address is not confirmed. The request is removed at once for good; the address is free again.",
+    "ERROR_TARGET_IS_UNCONFIRMED": "The address is not confirmed: delete the request.",
+    "ERROR_NOT_UNCONFIRMED": "The request is confirmed already.",
     "DONE_DENY": "Registration denied",
     "ERROR_NOT_PENDING": "This registration is decided already.",
     "ERROR_TARGET_IS_PENDING": "Accept or deny the registration first."