Overview Data Table - Part 1 of 4

A new overview tile that can be placed on trends or activity view to
display a table of data.

.. It uses a program to fetch the data to display via 3 functions:
   * names() returns a list of column names
   * units() returns a list of column unit names
   * values() returns a list of values to show

.. If there are more values than names then it is assumed there
   are multiple rows to be shown.

.. When adding a data tile an example program is provided to
   demonstrate how this works (will need to also document this
   on the wiki, or possibly a video tutorial).

src/Charts/Overview.cpp

@@ -161,6 +161,12 @@ OverviewWindow::getConfiguration() const
                 config += "\"polarized\":" + QString("%1").arg(zone->polarized) + ",";
             }
             break;
+        case OverviewItemType::DATATABLE:
+            {
+                DataOverviewItem *data = reinterpret_cast<DataOverviewItem*>(item);
+                config += "\"program\":\"" + QString("%1").arg(Utils::jsonprotect(data->program)) + "\",";
+            }
+            break;
         case OverviewItemType::KPI:
             {
                 KPIOverviewItem *kpi = reinterpret_cast<KPIOverviewItem*>(item);
@@ -486,6 +492,15 @@ OverviewWindow::setConfiguration(QString config)
                 }
                 break;
 
+            case OverviewItemType::DATATABLE:
+                {
+                    QString program=Utils::jsonunprotect(obj["program"].toString());
+                    add = new DataOverviewItem(space, name, program);
+                    add->datafilter = datafilter;
+                    space->addItem(order,column,span,deep, add);
+                }
+                break;
+
             case OverviewItemType::KPI :
                 {
                     QString program=Utils::jsonunprotect(obj["program"].toString());