Fix section icon when shoe the form as a page

[atmonshi]

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[what-the-diff]

PR Summary

• Addition of Icon Property in Designer.php
  This signifies an update in the visualization feature within our application. With this change, different segments in our program now have a unique icon, providing a more intuitive user interface.

• Improved Field Visibility Check in FieldsContract.php
  There's been an update to increase the effectiveness of how the program checks for certain information. Essentially, the system should now be more accurate and quick to show the data you need when working with our tool. Essentially, the improvements in checking whether something is present or not in the system have been enhanced, resulting in better efficiency.