sci-libs/lemon: Import latest tree changes

Package-Manager: portage-2.2.8
sci-chemistry/pymol: Merge tree changes

Package-Manager: portage-2.2.8
sci-chemistry/pymol: Readd argparse fix; fix icon installation

Package-Manager: portage-2.2.8
sci-chemistry/chimera-bin: Version BUmp, #498154

Package-Manager: portage-2.2.8
sci-chemistry/unio: Version BUmp

Package-Manager: portage-2.2.8
RepoMan-Options: --force