js/scatterPlot.js: updateMenu(), skip hidden axis

Closes #3418.
4 jobs for dev in 35 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test Tools
passed #150160
test_tools

00:00:05

 
  Test Quality
passed #150161
web
code_quality

00:00:08

 
  Test Unit
passed #150162
web
test_browser_unit

00:00:11

passed #150163
web
test_server_unit

00:00:20