Rename "Export As" button

In the "Export PNG Image" panel, there is a field called "Filename" which you can set to e.g. /tmp/foo/bar.png, and besides it there is a button titled "Export As". This name is misleading. It implies that when I click it, I can export the image as something else, other than PNG. That's not what it does. All it does is allow me to browse to a different folder, so it should be called "Browse".

Furthermore, the title "Export As" conflicts with the other "Export" button, confusing the user.