Uniformize folder structure (#693)

* Uniformize folder structure

* Fix icons

* Fix icons

* Fix tests

* Fix tests

front/src/modules/ui/table/states/numberOfTableColumnsSelectorState.ts

@@ -0,0 +1,12 @@
+import { selector } from 'recoil';
+
+import { entityTableDimensionsState } from './entityTableDimensionsState';
+
+export const numberOfTableColumnsSelectorState = selector<number>({
+  key: 'numberOfTableColumnsState',
+  get: ({ get }) => {
+    const { numberOfColumns } = get(entityTableDimensionsState);
+
+    return numberOfColumns;
+  },
+});