GridFlag
class GridFlag
GridFlag defines the available flags of Grid SubGridByColRow: reverse the width and height specification for spans/skips. Original - Position:HeightxWidth; with the flag - Position:WidthxHeight SpansRespectWidgetOrder: spans would respect the order of the widgets. Original - the widgets in the front of the widget list would be assigned to the spanned area; with the flag - all the widges will be arranged based on the given order. For example, for a layout with 1 row and 3 columns. If we have two widgets: w1, w2 with a span as 1:1x2, the original layout would be w2 w1 w1. Since w1 is in the front of the list, it would be assigned to the spanned area. With the flag, the layout would be w1 w2 w2 that respects the order of the widget list.