js/scatterPlot.js: A clone must have a positive size to be viewed

Fixes #3291 and follows f8075d81
7 jobs for hotfix-c/3291-invisible-clones in 6 minutes and 40 seconds (queued for 2 minutes and 50 seconds)
Status Name Job ID Coverage
  Test Tools
passed test_tools #117905

00:00:02

 
  Test Quality
passed code_quality #117906
web

00:00:14

 
  Test Unit
passed test_browser_unit #117907
web

00:00:14

 
  Deploy Review
passed deploy_review #117908
web

00:00:19

passed stop_deploy_review #117909
web manual

00:00:09

 
  Test Functional
passed test_browser-functional #117910
web

00:03:21

 
  Test Functional External
passed test_browser-functional-external #117911
web

00:02:17