localization updates

src/components/settings_modal/tabs/general_tab.js

@@ -41,7 +41,7 @@ const GeneralTab = {
       thirdColumnModeOptions: ['none', 'notifications', 'postform'].map(mode => ({
         key: mode,
         value: mode,
-        label: this.$t(`settings.conversation_display_${mode}`)
+        label: this.$t(`settings.third_column_mode_${mode}`)
       })),
       loopSilentAvailable:
       // Firefox

src/i18n/en.json

@@ -367,7 +367,7 @@
     "max_thumbnails": "Maximum amount of thumbnails per post (empty = no limit)",
     "hide_isp": "Hide instance-specific panel",
     "hide_shoutbox": "Hide instance shoutbox",
-    "right_sidebar": "Show sidebar on the right side",
+    "right_sidebar": "Reverse order of columns",
     "always_show_post_button": "Always show floating New Post button",
     "hide_wallpaper": "Hide instance wallpaper",
     "preload_images": "Preload images",
@@ -481,6 +481,12 @@
     "subject_line_noop": "Do not copy",
     "conversation_display": "Conversation display style",
     "conversation_display_tree": "Tree-style",
+    "disable_sticky_headers": "Don't stick column headers to top of the screen",
+    "show_scrollbars": "Show side column's scrollbars",
+    "third_column_mode": "When there's enough space, show third column containing",
+    "third_column_mode_none": "Don't show third column at all",
+    "third_column_mode_notifications": "Notifications column",
+    "third_column_mode_postform": "Main post form and navigation",
     "tree_advanced": "Allow more flexible navigation in tree view",
     "tree_fade_ancestors": "Display ancestors of the current status in faint text",
     "conversation_display_linear": "Linear-style",