Merged PR 16: Transform every single class components into functional component

This improve greatly the performance and the code cleaning.
It allows us to separate the inseparable class methods into modules functions

src/utils/default.ts

@@ -0,0 +1,37 @@
+import { Configuration } from '../Interfaces/Configuration';
+import Properties from '../Interfaces/Properties';
+
+export const DEFAULT_CONFIG: Configuration = {
+  AvailableContainers: [
+    {
+      Type: 'Container',
+      Width: 75,
+      Height: 100,
+      Style: {
+        fillOpacity: 0,
+        stroke: 'green'
+      }
+    }
+  ],
+  AvailableSymbols: [],
+  MainContainer: {
+    Type: 'Container',
+    Width: 2000,
+    Height: 100,
+    Style: {
+      fillOpacity: 0,
+      stroke: 'black'
+    }
+  }
+};
+
+export const DEFAULT_MAINCONTAINER_PROPS: Properties = {
+  id: 'main',
+  parentId: 'null',
+  x: 0,
+  y: 0,
+  width: DEFAULT_CONFIG.MainContainer.Width,
+  height: DEFAULT_CONFIG.MainContainer.Height,
+  fillOpacity: 0,
+  stroke: 'black'
+};