Refactored template; make main content scrollable without overflow

Switched to Flexbox CSS based layout
Retargeted HTML-elements for theming

public/lucidAuth.manage.php

@@ -12,7 +12,7 @@
 
         try {
         	$allUsers = $pdoDB->query('
-                SELECT User.Username, Role.Rolename, COUNT(DISTINCT SecureToken.Value) AS Sessions
+                SELECT User.Id, User.Username, Role.Rolename, COUNT(DISTINCT SecureToken.Value) AS Sessions
 		        FROM User
     		    LEFT JOIN Role
 	    		    ON (User.RoleId=Role.Id)
@@ -25,19 +25,22 @@
         }
 
     	foreach($allUsers as $row) {
-            $tableRows[] = sprintf('<tr><td>%1$s</td><td>%2$s</td><td class="immutable"><a href="?">%3$s</a></td></tr>',
+            $tableRows[] = sprintf('<tr><td data-userid="%1$s">%2$s</td><td>%3$s</td><td class="immutable"><a href="?">%4$s</a></td></tr>',
+                $row['Id'],
                 explode('\\', $row['Username'])[1],
                 $row['Rolename'],
                 $row['Sessions']
             );
     	}
 
-		echo sprintf($pageLayout['full'],
-			sprintf($contentLayout['manage'],
-				$validateTokenResult['name'],
+        echo sprintf($pageLayout['full2'],
+            sprintf($contentLayout['manage']['header'],
+                $validateTokenResult['name']
+            ),
+            sprintf($contentLayout['manage']['section'],
                 implode($tableRows)
-			)
-		);
+            )
+        );
 	} else {
 		// No cookie containing valid authentication token found;
 		//   explicitly deleting any remaining cookie, then redirecting to loginpage