fix(MMAP-35): GUI on upload file

[dibericky]

Checklist

• your branch will not cause merge conflict with master
• run npm test
• tests are included
• the documentation is updated or integrated accordingly with your changes
• the code will follow the lint rules and style of the project
• you are not committing extraneous files or sensible data

[davidebianchi]

Style of the image is not good. There is a file word, with type and size to the next line indented and the word bytes it's in another line.
The Scegli file button is in the right, I think it should be better to be at the left.

It's possible to improve the GUI style?

[dibericky]

fixed GUI @davidebianchi
updated image on p.r. description