Fix error message when entering no password

- making the message more generic
so that it can be reused for the 2FA setting

customize.dist/src/less2/include/alertify.less

@@ -33,6 +33,7 @@
             font-size: large;
 
             box-shadow: @alertify_box-shadow;
+            border-radius: @variables_radius;
             &, &.default {
                 // FIXME
                 background: @cp_alertify-log-bg;

www/settings/inner.js

@@ -53,6 +53,7 @@ define([
     Messages.settings_mfaHint = "Protect your account..."; // XXX
     // Messages.settings_cat_access = "Security"; // XXX
     Messages.settings_cat_security = "Security & Privacy"; // XXX EXISTING KEY TO CHANGE
+    Messages.login_noSuchUser = "Invalid username or password";  // XXX EXISTING KEY TO CHANGE
     Messages.done = "Done";
     Messages.continue = "Continue";
     Messages.mfa_setup_label = "To enable 2FA, please begin by entering your account password"; // XXX