Revert "don't (uselessly) add annotation class to ann text group inner"
Revert "don't (uselessly) add annotation class to ann text group inner"

This reverts commit 1a8f1ed1e855fb9157f728c191b00784fe3f1258.

etpinard/plotly.js,plotly/plotly.js,etpinard/plotly.js,iongroup/plotly.js,plotly/plotly.js,iongroup/plotly.js,plotly/plotly.js,iongroup/plotly.js,asolagmbh/plotly.js,plotly/plotly.js,etpinard/plotly.js,aburato/plotly.js,asolagmbh/plotly.js,asolagmbh/plotly.js,aburato/plotly.js