Stretch the fallback titlecard to the screen

This happened because of !816 (merged), but it only worked before by coincidence.

Basically, the screen was cleared before drawing the screenshot or fallback titlecard. These are invalidated when the intermission ends--however the drawer keeps running, filing black before the wipe started.

It was only really necessary to clear the screen because the fallback titlecard could not always fit. Now it just stretches. :V

The new title says it all...