Fixed paths to images

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Make sure ShowFileView has white background

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Use template stylesheets for ShowFileView

Signed-off-by: Sven Strickroth <email@cs-ware.de>