Fix PHP 8.4 compatibility issues in Sensational theme

- Fixed deprecated WP_Widget constructors in all widget files
- Changed $this->WP_Widget() to parent::__construct() in:
  * widget-social.php
  * widget-fblikebox.php
  * widget-googleplus.php
  * widget-tabs.php
- Fixed old-style constructor methods to __construct() in:
  * widget-ad125.php (mts_Ad_Widget -> __construct)
  * widget-ad300.php (mts_ad_300_Widget -> __construct)
- Fixed for loop syntax error in widget-tweets.php (for(i; -> for($i = 1;)
- Enabled registration for ad125 and ad300 widgets
- Added new 'After First Paragraph' widget area for in-content ads

All widgets now compatible with PHP 8.4 and editable in WordPress admin.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

functions/welcome-message.php

@@ -0,0 +1,47 @@
+<?php 
+
+add_action( 'admin_enqueue_scripts', 'mts_sensational_pointer_header' );
+function mts_sensational_pointer_header() {
+    $enqueue = false;
+
+    $dismissed = explode( ',', (string) get_user_meta( get_current_user_id(), 'dismissed_wp_pointers', true ) );
+
+    if ( ! in_array( 'mts_sensational_pointer', $dismissed ) ) {
+        $enqueue = true;
+        add_action( 'admin_print_footer_scripts', 'mts_sensational_pointer_footer' );
+    }
+
+    if ( $enqueue ) {
+        // Enqueue pointers
+        wp_enqueue_script( 'wp-pointer' );
+        wp_enqueue_style( 'wp-pointer' );
+    }
+}
+
+function mts_sensational_pointer_footer() {
+    $pointer_content = '<h3>Awesomeness!</h3>';
+    $pointer_content .= '<p>You have just Installed Sensational WordPress Theme by MyThemeShop.</p>';
+	$pointer_content .= '<p>You can Trigger The Awesomeness using Amazing Option Panel in <b>Theme Options</b>.</p>';
+    $pointer_content .= '<p>If you face any problem, head over to <a href="http://mythemeshop.com/support">Knowledge Base</a></p>';
+?>
+<script type="text/javascript">// <![CDATA[
+jQuery(document).ready(function($) {
+    $('#menu-appearance').pointer({
+        content: '<?php echo $pointer_content; ?>',
+        position: {
+            edge: 'left',
+            align: 'center'
+        },
+        close: function() {
+            $.post( ajaxurl, {
+                pointer: 'mts_sensational_pointer',
+                action: 'dismiss-wp-pointer'
+            });
+        }
+    }).pointer('open');
+});
+// ]]></script>
+<?php
+}
+
+?>