I have no idea why, but console's blur is smaller than in OSD messages
and stats (regardless of persistent_overlay). It's smaller regardless of
scale_with_window, or if using 0 PlayRes like stats with
persistent_overlay=yes.
With scale_with_window=yes, multiplying the blur by 2.5 seems to make it
the same. This is probably because 2.5 is 720 / 288, which are the base
height sizes scale from and the OSD's PlayResY. With
scale_with_window=no, we need to multiply by osd_h, which is always 720
with scale_with_window=yes.