Graphics help requested

I am adding some missing toolbar icons for Ark. I have one remaining image to add: tdeaccessibility/IconThemes/mono/scalable/actions/ark_deselectall.svgz I want to add a diagonal line with rounded ends, like this png mockup: http://humanreadable.nfshost.com/trinity/build_logs/ark_deselectall.png I tried karbon, but I'm beginning to believe karbon is user-hostile. I am able to draw a diagonal line with libreoffice draw, but I cannot figure out how to draw a line with rounded ends and found no help online. By the way, libreoffice draw can't load svgz. The file needs to be decompressed and then the file loads. To anybody who can help, use tdeaccessibility/IconThemes/mono/scalable/actions/ark_selectall.svgz as the foundation, add the diagonal line with rounded ends, and rename to ark_deselectall.svgz. As always thanks again! Darrell