fix prototype

use download_cols to wrap the text in the download buffer download_lines is a very small value, for a normally sized terminal is exactly 5. This was the cause behind the download pane glitch, 5 was used as *column number* for the reflow. Now, to be honest, the exact width passed to wrap_page is not important. wrap_page will only wrap the size string, which we know is less than or equal to FMT_SCALED_STRSIZE-1 (6). We could also hardcode the value eventually, but using download_cols reads better.

pass the correct pointer

swap the fields in download lines

switch to our new struct download for the downloads

wrap download page

add download and download.* line styles

add side window for downloads