[Enhancement] Allow to customize FileUpload UI

[ammar91]

Currently there is a fixed template of FileUpload component. It would be great if there is a way to customize ui even more simpler. Like in my case, I just want to have one single button, when click it let me pick the file/files and as soon as the file picked, upload start immediately.

[ammar91]

@cagataycivici Thanks for adding a way to customize UI. However, I'm still looking for something really simple.

As I mentioned, I would like to have single button with auto upload support which is now working as intended. But wonder if I can hide upload and cancel button. Also, in my case I don't want to show File List UI, so I want to hide this as well.

Basically, if we could switch between Basic and Advance UI, that would be great. Something like this https://blueimp.github.io/jQuery-File-Upload/basic-plus.html , but again, the File List UI should be optional so one can hide it easily if not needed.

And finally, there should a Label property to change the default text "Choose" of file selection input.