do not show column header for series (PY-21763)

Series are 1-dimensional array, so column header is useless for them

python/src/com/jetbrains/python/debugger/containerview/DataViewStrategy.java

@@ -41,6 +41,10 @@ public abstract class DataViewStrategy {
   @NotNull
   public abstract String getTypeName();
 
+  public boolean showColumnHeader() {
+    return true;
+  }
+
   /**
    * @return null if no strategy for this type
    */
@@ -60,5 +64,10 @@ public abstract class DataViewStrategy {
     public String getTypeName() {
       return "Series";
     }
+
+    @Override
+    public boolean showColumnHeader() {
+      return false;
+    }
   }
 }

python/src/com/jetbrains/python/debugger/containerview/PyDataViewerPanel.java

@@ -205,6 +205,7 @@ public class PyDataViewerPanel extends JPanel {
       if (myTable.getColumnCount() > 0) {
         myTable.setDefaultRenderer(myTable.getColumnClass(0), cellRenderer);
       }
+      myTable.setShowColumns(strategy.showColumnHeader());
     });
   }