cleanup a couple final references to the old preview_display attribute

frontend/src/card/card.controllers.js

@@ -476,7 +476,7 @@ CardControllers.controller('CardDetail', [
                 } else {
                     isObjectDetail = false;
 
-                    // if we are display bare rows, filter out columns with preview_display = false
+                    // if we are display bare rows, filter out columns with visibility_type = details-only
                     if (Query.isStructured(dataset_query) &&
                             Query.isBareRowsAggregation(dataset_query.query)) {
                         queryResult.data = DataGrid.filterOnPreviewDisplay(queryResult.data);

frontend/src/lib/data_grid.js

@@ -9,8 +9,8 @@ function compareNumbers(a, b) {
 
 var DataGrid = {
     filterOnPreviewDisplay: function(data) {
-        // find any columns where preview_display = false
-        var hiddenColumnIdxs = _.map(data.cols, function(col, idx) { if(!col.preview_display) return idx; });
+        // find any columns where visibility_type = details-only
+        var hiddenColumnIdxs = _.map(data.cols, function(col, idx) { if(col.visibility_type === "details-only") return idx; });
         hiddenColumnIdxs = _.filter(hiddenColumnIdxs, function(val) { return val !== undefined; });
 
         // filter out our data grid using the indexes of the hidden columns
@@ -25,7 +25,7 @@ var DataGrid = {
         });
 
         return {
-            cols: _.filter(data.cols, function(col) { return col.preview_display; }),
+            cols: _.filter(data.cols, function(col) { return col.visibility_type !== "details-only"; }),
             columns: _.map(data.cols, function(col) { return col.display_name; }),
             rows: filteredRows,
             rows_truncated: data.rows_truncated