Is your feature request related to a problem? Please describe.
No.
Describe the solution you'd like
I think the "upload" button should provide a file browser popup to manually search for the file like in the old panel. Personally I don't like the drag and drop feature at all, because then I need to open windows explorer and navigate to the file, then split the browser windows to drag the file into that window. It is a lot easier to just open a file browser right away and then select the file.
Describe alternatives you've considered
The current behavior of just drag-and-drop.
I would like to see the conventional file uploader in 1.0.
That option has been there since RC1 or RC2

That option has been there since RC1 or RC2
I think the "upload" button should provide a file browser popup.
He is asking for the ability to select a file using the Operating Systems native file selector like so

I see. My apologies.
I agreee that would be useful. I mean showing the drag and drop text makes sense but there should be a button to open the dialog.
Most helpful comment
I would like to see the conventional file uploader in 1.0.