Directly into the idea:
Make it possible for certain fields to appear on the entire area like the field Description in the image below:
Here are the changes, made to look like that int the file client/issuedetails.html.php
Also, because in this case you will need a text field larger then 255 symbols, you can use a field in the database of type TEXT for example.
If you make this possible, in the next version I'll surely donate some money to this project.
Thanks a lot.