ev-recent-view: scale default mime type icon

when eg. the thumbnail is not available due to
file being on an unmounted location.

Issue #981
3 jobs for 981-default-mime-type-icon-in-recent-view-is-too-big in 23 minutes and 19 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #102451
flatpak

00:23:18

manual #102450
allowed to fail manual
gtk-doc
passed #102449
master

00:05:20