Describe the bug

After using phpMyAdmin website a lot of temp files are created in a tmp folder.

To Reproduce

Steps to reproduce the behavior:

1. Open phpMyAdmin website
2. Close it after you made your changes
3. Have a look at folder ./phpMyAdmin/tmp

Expected behavior

All temp files should be deleted after work is finished

Screenshots

n/a

Server configuration

• Operating system: Windows 7 (32bit)
• XAMPP 7.2.9 including
• Web server: Apache 2.4.34
• Database version: 10.1.35
• PHP version: 7.2.9
• phpMyAdmin version: 4.8.3

Client configuration

• Browser: Mozilla Firefox 61.0.2
• Operating system: Windows 7 (32bit)

Additional context

n/a