Checkmk Werk 7452: Fix graphs vertical grid on top of vertial axis labels

ID: 7452 Title: Fix graphs vertical grid on top of vertial axis labels Component: metrics Level: 1 Class: Bug fix Version: 1.7.0i1 When visualizing time ranges of few months time axis label resolution is weeks. Grid vertical auxiliary lines would start before the data/graph itself and thus obstruct the labels of the vertical axis.