Checkboxes: The "Select All" option checks disabled choices

[JaneSjs]

T15877 - Checkbox option is selecting even if it is in read only state
https://surveyjs.answerdesk.io/internal/ticket/details/T15877

In the following sample, the second option is disabled. Still, the Select All option checks this option too.

{
 "pages": [
  {
   "name": "page1",
   "elements": [
    {
     "type": "checkbox",
     "name": "question1",
     "choices": [
      "Item 1",
      {
       "value": "Item 2",
       "enableIf": "false"
      },
      "Item 3"
     ],
     "showSelectAllItem": true
    }
   ]
  }
 ]
}

2023-12-05_16-41-22.mp4

Expected behavior: the Select All option checks only enabled options.