Fix: Clear the collection background only if we have a background pixmap.
tree846ae7f2146fd57e93999606a2536b0b000b4f2b
drwxr-xr-x - Choices
-rw-r--r-- 2980 README
-rw-r--r-- 3247 README-es
-rw-r--r-- 1322 ROX-Filer.xml
drwxr-xr-x - ROX-Filer
-rwxr-xr-x 5816 install.sh
-rw-r--r-- 186 rox.xml