Add i18n for 'Loading' messages

src/config/locales/en/translation.json

@@ -224,6 +224,7 @@
   },
   "validation": {
     "login": {
+      "loading": "Loading...",
       "rquire_domain_name": "Domain name is required",
       "domain_format": "Please write only domain name"
     },

src/config/locales/ja/translation.missing.json

@@ -0,0 +1,10 @@
+{
+  "timeline": {
+    "loading": "Loading..."
+  },
+  "validation": {
+    "login": {
+      "loading": "Loading..."
+    }
+  }
+}

src/renderer/components/Login/LoginForm.vue

@@ -68,7 +68,7 @@ export default {
     login () {
       const loading = this.$loading({
         lock: true,
-        text: 'Loading',
+        text: this.$t('validation.login.loading'),
         spinner: 'el-icon-loading',
         background: 'rgba(0, 0, 0, 0.7)'
       })

src/renderer/components/TimelineSpace.vue

@@ -2,7 +2,7 @@
 <div
   id="timeline_space"
   v-loading="loading"
-  element-loading-text="Loading..."
+  :element-loading-text="$t('timeline.loading')"
   element-loading-spinner="el-icon-loading"
   element-loading-background="rgba(0, 0, 0, 0.8)"
   >