Open files rather than previewing them

Allows you to have multiple files open in tabs even if you haven't changed them, rather than the next file you open replacing the existing (unchanged) file.

.vscode/settings.json

@@ -2,4 +2,6 @@
   "files.exclude": {
     "**/translations": true
   }
-}
+  "workbench.editor.enablePreview": false,
+  "workbench.editor.enablePreviewFromQuickOpen": false  
+}