comments on columns

Show the comments in the list of columns of a table.
Generate SQL to set them.

pglab/ColumnTableModel.cpp

@@ -77,6 +77,9 @@ QVariant ColumnTableModel::headerData(int section, Qt::Orientation orientation,
 				case CollationCol:
 					c = tr("Collation");
 					break;
+                case CommentCol:
+                    c = tr("Comment");
+                    break;
 				}
 			}
 			v = c;
@@ -200,6 +203,9 @@ QVariant ColumnTableModel::getData(const QModelIndex &index) const
 					v = col->objectName();
 			}
 			break;
+        case CommentCol:
+            v = t.description;
+            break;
 		}
 	}