Fix grid layout for the dataset table when only one column.

src/app/geosource/components/dataset-detail/dataset-table/dataset-table.component.ts

-import { Component, OnInit, ElementRef, QueryList, ViewChildren,
-  OnDestroy, Input, Output, EventEmitter } from '@angular/core';
+import {
+  Component, OnInit, ElementRef, QueryList, ViewChildren,
+  OnDestroy, Input, Output, EventEmitter
+} from '@angular/core';
 import { DatasetDetailService } from '../../../services';
 import { Data } from '../../../models';
 import { Subscription } from '../../../../../../node_modules/rxjs';
@@ -69,9 +71,11 @@ export class DatasetTableComponent implements OnInit, OnDestroy {
   }
 
   getStyle() {
+    const gridColumns = this.selectedProperties.length !== 1 ?
+      `repeat(${this.selectedProperties.length - 1}, max-content) 1fr` : '1fr';
     return {
       // 'grid-template-columns': `repeat(${this.selectedProperties.length}, minmax(50px, 1fr)`,
-      'grid-template-columns': `repeat(${this.selectedProperties.length - 1}, max-content) 1fr`,
+      'grid-template-columns': gridColumns,
     };
   }