Fixes media editing undo

ts/components/MediaEditor.tsx

@@ -167,6 +167,8 @@ export const MediaEditor = ({
       [
         ev => ev.key === 'Escape',
         () => {
+          setEditMode(undefined);
+
           if (fabricCanvas.getActiveObject()) {
             fabricCanvas.discardActiveObject();
             fabricCanvas.requestRenderAll();
@@ -294,10 +296,25 @@ export const MediaEditor = ({
       });
     }
 
+    function handleMouseup(ev: MouseEvent): void {
+      if (
+        ev.target instanceof HTMLCanvasElement ||
+        ev.target instanceof HTMLButtonElement
+      ) {
+        return;
+      }
+
+      setEditMode(undefined);
+      ev.stopPropagation();
+      ev.preventDefault();
+    }
+
     document.addEventListener('keydown', handleKeydown);
+    document.addEventListener('mouseup', handleMouseup);
 
     return () => {
       document.removeEventListener('keydown', handleKeydown);
+      document.removeEventListener('mouseup', handleMouseup);
     };
   }, [fabricCanvas, history]);
 

ts/mediaEditor/useFabricHistory.ts

@@ -109,7 +109,7 @@ export class FabricHistory extends EventEmitter {
     }
 
     if (this.canRedo()) {
-      this.snapshots.splice(this.highWatermark, this.snapshots.length);
+      this.snapshots.splice(this.highWatermark + 1, this.snapshots.length);
     }
 
     this.snapshots.push({ canvasState: this.getState(), imageState });