Add/Remove Columns and measures in Table/Matrix Runtime

Enable adding and removing columns in table or matrix visual.

This is a must needed feature, most of the clients used to other reporting system looking for this feature as this enables user to select a defined hierarchy or set of attributes and choose what level of information is needed in run-time.

Also improve the self service experience of Power BI to next level. We are aware the run time selection of attributes feature is coming up but not sure if that is planned for matrix and table with dynamic column and measure selection. Please add. Thanks

-Ajil