Update UI reference articles

Author: Mikejo5000

.openpublishing.redirection.json

@@ -1,5 +1,10 @@
 {
   "redirections": [
+    {
+      "source_path": "docs/ide/reference/environment-preview-features-options.md",
+      "redirect_url": "/previous-versions/visualstudio/visual-studio-2017/ide/reference/environment-preview-features-options",
+      "redirect_document_id": false
+    },
     {
       "source_path": "docs/ide/reference/options-text-editor-file-extension.md",
       "redirect_url": "/previous-versions/visualstudio/visual-studio-2017/ide/reference/options-text-editor-file-extension",

docs/ide/reference/environment-preview-features-options.md

@@ -930,8 +930,6 @@
           href: ide/reference/fonts-and-colors-environment-options-dialog-box.md
         - name: Import and Export Settings
           href: ide/reference/import-and-export-settings-environment-options-dialog-box.md
-        - name: Preview Features
-          href: ide/reference/environment-preview-features-options.md
         - name: Trust Settings
           href: ide/reference/trust-settings.md
         - name: Notifications window