Added checks for admin permissions to settings / users.

Added welcome message and start page contents in input interface (iss0000160).

inc/standardHTML.php

@@ -115,7 +115,7 @@ function printPublicEnd():string {
  */
 function printStaticPagePart(string $file, string $elem):string {
 
-    if (!in_array($file, ['footer', 'aside', 'banner'])) {
+    if (!in_array($file, ['footer', 'aside', 'banner', 'welcomeMsg'])) {
         echo "Trying to access disallowed file.";
     }