Creates an object from the class and adds it to the objects element list.
Class Details
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Layout for displaying two elements side by side.
This splits the area contained by this element in two, side by side by a specified percentage (relative to the left side). A layout can be nested. Fx. a HorizontalLayout can layout two Image_Graph_Layout_Verticals to make a 2 by 2 matrix of 'element-areas'.