Reintroduce multi-point arrows and add migration for it (#635)

* Revert "Revert "Feature: Multi Point Arrows (#338)" (#634)"

This reverts commit 3d2e59bfed.

* Convert old arrow spec to new one

* Remove unnecessary failchecks and fix context transform issue in retina displays

* Remove old points failcheck from getArrowAbsoluteBounds

* Remove all failchecks for old arrow

* remove the rest of unnecessary checks

* Set default values for the arrow during import

* Add translations

* fix restore using unmigrated elements for state computation

* don't use width/height when migrating from new arrow spec

Co-authored-by: David Luzar <luzar.david@gmail.com>
Co-authored-by: Christopher Chedeau <vjeuxx@gmail.com>

src/actions/actionFinalize.tsx

@@ -0,0 +1,27 @@
+import { Action } from "./types";
+import { KEYS } from "../keys";
+import { clearSelection } from "../scene";
+
+export const actionFinalize: Action = {
+  name: "finalize",
+  perform: (elements, appState) => {
+    if (window.document.activeElement instanceof HTMLElement) {
+      window.document.activeElement.blur();
+    }
+    return {
+      elements: clearSelection(elements),
+      appState: {
+        ...appState,
+        elementType: "selection",
+        draggingElement: null,
+        multiElement: null,
+      },
+    };
+  },
+  keyTest: (event, appState) =>
+    (event.key === KEYS.ESCAPE &&
+      !appState.draggingElement &&
+      appState.multiElement === null) ||
+    ((event.key === KEYS.ESCAPE || event.key === KEYS.ENTER) &&
+      appState.multiElement !== null),
+};