Merge branch 'default-nb-bins' into 'master'

Change default number of bins and add tooltips

Closes #44

See merge request !104
6 jobs for master in 5 minutes and 52 seconds (queued for 4 minutes and 53 seconds)
Status Job ID Name Coverage
  Build
passed #19144
build_python2

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passed #19145
build_python3

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  Test
passed #19146
test_python2

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passed #19147
test_python3

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  Deploy
passed #19148
pages

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failed pages:deploy

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