userpage: use form langfile, move login strings to common

login-related stuff was moved into common using the langmover script, so
that the user page doesn't have to use the admin language files.

lang/common/en-gb.json

@@ -3,27 +3,35 @@
         "name": "English (GB)"
     },
     "strings": {
-        "continue": "Continue",
-        "time24h": "24h Time",
-        "linkTelegram": "Link Telegram",
-        "send": "Send",
-        "linkDiscord": "Link Discord",
-        "linkMatrix": "Link Matrix",
-        "contactDiscord": "Contact through Discord",
         "username": "Username",
         "password": "Password",
         "emailAddress": "Email Address",
+        "name": "Name",
+        "submit": "Submit",
+        "send": "Send",
+        "success": "Success",
+        "continue": "Continue",
+        "error": "Error",
         "copy": "Copy",
         "copied": "Copied",
-        "submit": "Submit",
-        "success": "Success",
-        "error": "Error",
+        "time24h": "24h Time",
         "time12h": "12h Time",
-        "theme": "Theme",
+        "linkTelegram": "Link Telegram",
         "contactEmail": "Contact through Email",
         "contactTelegram": "Contact through Telegram",
-        "name": "Name",
+        "linkDiscord": "Link Discord",
+        "linkMatrix": "Link Matrix",
+        "contactDiscord": "Contact through Discord",
+        "theme": "Theme",
         "refresh": "Refresh",
-        "required": "Required"
+        "required": "Required",
+        "login": "Login",
+        "logout": "Logout"
+    },
+    "notifications": {
+        "errorLoginBlank": "The username and/or password was left blank.",
+        "errorConnection": "Couldn't connect to jfa-go.",
+        "errorUnknown": "Unknown error.",
+        "error401Unauthorized": "Unauthorised. Try refreshing the page."
     }
-}
+}