add . for english i18n

packages/app/public/static/locales/en_US/translation.json

@@ -724,16 +724,16 @@
     "user_already_loggedin": "You cannot create a new account when you are logged in.",
     "registration_closed": "You are not authorized to create a new account.",
     "Username has invalid characters": "Username has invalid characters.",
-    "Username field is required": "User ID field is required",
-    "Name field is required": "Name field is required",
-    "Email format is invalid": "Email format is invalid",
-    "Email field is required": "Email field is required",
-    "Password has invalid character": "Password has invalid character",
-    "Password minimum character should be more than 8 characters": "Password minimum character should be more than 8 characters",
-    "Password field is required": "Password field is required",
-    "Username or E-mail has invalid characters": "Username or E-mail has invalid characters",
-    "Password minimum character should be more than 6 characters": "Password minimum character should be more than 6 characters",
-    "user_not_found": "User not found"
+    "Username field is required": "User ID field is required.",
+    "Name field is required": "Name field is required.",
+    "Email format is invalid": "Email format is invalid.",
+    "Email field is required": "Email field is required.",
+    "Password has invalid character": "Password has invalid character.",
+    "Password minimum character should be more than 8 characters": "Password minimum character should be more than 8 characters.",
+    "Password field is required": "Password field is required.",
+    "Username or E-mail has invalid characters": "Username or E-mail has invalid characters.",
+    "Password minimum character should be more than 6 characters": "Password minimum character should be more than 6 characters.",
+    "user_not_found": "User not found."
   },
   "grid_edit":{
     "create_bootstrap_4_grid":"Create Bootstrap 4 Grid",