Enhance product links and translations; update styles and add registration modal

- Updated product links in rma.php and rma_manage.php to include icons for better UX.
- Improved German, Spanish, Dutch, Polish, Portuguese, and US translations with new phrases for software licenses and user information prompts.
- Refactored CSS to remove redundant styles and added new styles for a registration modal, enhancing the overall UI.
- Introduced JavaScript variables for user information prompts in softwaretool.php for better localization support.

contract.php

@@ -309,7 +309,7 @@ $view .= '<div class="content-block">
              <tbody>';
             //Check for assigned tools
             foreach ($servicetools as $tools){
-                $view .=  '<tr><td>'.(($view_equipment == 1)? '<a href="index.php?page=equipment&serialnumber='.$tools.'" class="btn2">'.$tools.'</a>':$tools).'</td><tr>';
+                $view .=  '<tr><td>'.(($view_equipment == 1)? '<a href="index.php?page=equipment&serialnumber='.$tools.'" class="link-with-icon">'.$tools.' <i class="fa-solid fa-up-right-from-square"></i></a>':$tools).'</td><tr>';
                 }
 $view .= ' 
                     </tbody>