Implement new features for svg components + improve form properties (#25)

- Make Dimension an actual svg line
- Implement XPositionReference
- Select the container above after delete
- Remove DimensionLayer
- Improve form properties

Reviewed-on: https://git.siklos-chaneru.duckdns.org/Siklos/svg-layout-designer-react/pulls/25

src/Components/ElementsSidebar/ElementsSidebar.tsx

@@ -9,7 +9,6 @@ import { MenuItem } from '../Menu/MenuItem';
 import { handleDragLeave, handleDragOver, handleLeftClick, handleOnDrop, handleRightClick } from './MouseEventHandlers';
 import { Point } from '../../Interfaces/Point';
 
-
 interface IElementsSidebarProps {
   MainContainer: IContainerModel
   isOpen: boolean
@@ -108,7 +107,7 @@ export const ElementsSidebar: React.FC<IElementsSidebarProps> = (props: IElement
         onLeftClick
       );
     };
-  }, []);
+  });
 
   // Render
   let isOpenClasses = '-right-64';