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/Interfaces/Properties.ts

@@ -1,4 +1,5 @@
 import * as React from 'react';
+import { XPositionReference } from '../Enums/XPositionReference';
 
 export default interface Properties extends React.CSSProperties {
   id: string
@@ -6,4 +7,5 @@ export default interface Properties extends React.CSSProperties {
   x: number
   y: number
   isRigidBody: boolean
+  XPositionReference?: XPositionReference
 }