update the number of rows if the data set changes on mdTable (#320)
update the number of rows if the data set changes on mdTable (#320)

* Fix on mdTable numberOfRows and numberOfSelected

* Fix on mdTable numberOfRows and numberOfSelected

praneetloke/vue-material,jaceks-iRonin/vue-material-test,jaceks-iRonin/vue-material-test,praneetloke/vue-material