Fix choosing of formatting unit (#4779)
Fix choosing of formatting unit (#4779)

* Don't change minorFormat when determining label capacity

* Fix choosing of formatting unit

chartjs/Chart.js,chartjs/Chart.js,jtcorbett/Chart.js,supernovel/Chart.js,touletan/Chart.js,simonbrunel/Chart.js,supernovel/Chart.js,ldwformat/Chart.js,touletan/Chart.js,touletan/Chart.js,touletan/Chart.js,ldwformat/Chart.js,jtcorbett/Chart.js,simonbrunel/Chart.js,chartjs/Chart.js,nnnick/Chart.js,chartjs/Chart.js