[Editor] Add some resizers all around an editor (bug 1843302)

- it'll improve the way to resize images: diagonally (in keeping ratio between dimensions)
  or horizontally/vertically.
- the resizer was almost invisible in HCM.
- make a resize undoable/redoable.

src/display/editor/tools.js

@@ -280,6 +280,12 @@ class CommandManager {
     this.#commands.push(save);
   }
 
+  stopUndoAccumulation() {
+    if (this.#position !== -1) {
+      this.#commands[this.#position].type = NaN;
+    }
+  }
+
   /**
    * Undo the last command.
    */
@@ -1168,6 +1174,10 @@ class AnnotationEditorUIManager {
     return this.#selectedEditors.size !== 0;
   }
 
+  stopUndoAccumulation() {
+    this.#commandManager.stopUndoAccumulation();
+  }
+
   /**
    * Undo the last command.
    */