Add icons to reduce dependence on Red/Green colours

Branch: randlet/qatrackplus:0.2.8_pass_fail_icons
Branch: tohccmedphys/qatrackplus:0.2.8
Merged
Merged pull request
Merged in randlet/qatrackplus/0.2.8_pass_fail_icons (pull request #11)
Merged in randlet/qatrackplus/0.2.8_pass_fail_icons (pull request #11)