Cannot rename or delete "Average line" or other lines in section "Add further analyses to your visual". Once a line is added, it's impossible to rename it or delete it. It seems like the changes are not applying to a visual. For example, if we rename average line from "Average line 1" to "Average", the name doesn't change on the line chart. Or if we delete the line, the line is still there. The most interesting thing is that this bug is only on charts with Date hierarchy from year to day. But for visuals with quarterly axis there is no issue at all. Please fix this.