Examine contents: fix setting all_selected using checklist
Examine contents: fix setting all_selected using checklist

Fixes #53.

artefactual-labs/appraisal-tab,eckardm/appraisal-tab,djpillen/appraisal-tab,artefactual-labs/appraisal-tab,djpillen/appraisal-tab,eckardm/appraisal-tab