move translation strings to correct place, translate error message

src/components/post_status_form/post_status_form.js

@@ -192,7 +192,7 @@ const PostStatusForm = {
       if (this.posting) { return }
       if (this.submitDisabled) { return }
       if (this.emptyStatus) {
-        this.error = 'Cannot post an empty status with no files'
+        this.error = this.$t('post_status.empty_status_error')
         return
       }
 
@@ -240,7 +240,7 @@ const PostStatusForm = {
     },
     previewStatus () {
       if (this.emptyStatus && this.newStatus.spoilerText.trim() === '') {
-        this.preview = { error: this.$t('status.preview_empty') }
+        this.preview = { error: this.$t('post_status.preview_empty') }
         this.previewLoading = false
         return
       }

src/components/post_status_form/post_status_form.vue

@@ -21,7 +21,7 @@
             class="preview-toggle faint"
             @click.stop.prevent="togglePreview"
           >
-            {{ $t('status.preview') }}
+            {{ $t('post_status.preview') }}
             <i
               class="icon-down-open"
               :style="{ transform: showPreview ? 'rotate(0deg)' : 'rotate(-90deg)' }"

src/i18n/en.json

@@ -189,6 +189,9 @@
     "direct_warning_to_all": "This post will be visible to all the mentioned users.",
     "direct_warning_to_first_only": "This post will only be visible to the mentioned users at the beginning of the message.",
     "posting": "Posting",
+    "preview": "Preview",
+    "preview_empty": "Empty",
+    "empty_status_error": "Can't post an empty status with no files",
     "scope_notice": {
       "public": "This post will be visible to everyone",
       "private": "This post will be visible to your followers only",
@@ -644,8 +647,6 @@
     "copy_link": "Copy link to status",
     "thread_muted": "Thread muted",
     "thread_muted_and_words": ", has words:",
-    "preview": "Preview",
-    "preview_empty": "Empty",
     "show_full_subject": "Show full subject",
     "hide_full_subject": "Hide full subject",
     "show_content": "Show content",