Qt: Fix: Actually use scaled_pixmap

Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
Qt: pep8

Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
bos: get thumb urls now returns a list of possible urls

Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
Remove unused import

Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>
Qt: remove semicolons

Signed-off-by: Simon Marchi <simon.marchi@polymtl.ca>