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>

searchform.php

@@ -0,0 +1,7 @@
+<form method="get" id="searchform" class="search-form" action="<?php echo home_url(); ?>" _lpchecked="1">
+	<fieldset>
+		<input type="text" name="s" id="s" value="<?php _e('Search the site','mythemeshop'); ?>" onblur="if (this.value == '') {this.value = '<?php _e('Search the site','mythemeshop'); ?>';}" onfocus="if (this.value == '<?php _e('Search the site','mythemeshop'); ?>') {this.value = '';}" >
+		<input id="search-image" class="sbutton" type="submit" value="">
+		<i class="icon-search"></i>
+	</fieldset>
+</form>