Core modal. Sometimes parameters are disposed due to the race condition.

[ievgennaida]

  "dependencies": {
    "framework7": "^8.3.0",
    "framework7-svelte": "^8.3.0",
    "svelte": "^4.2.0"
  },
  "devDependencies": {
    "@sveltejs/vite-plugin-svelte": "^2.4.5",
    "vite": "^4.4.9"
  }

Describe the bug

When modal is disposed some events still can be fired that can lead to undefined access exception.
(See screenshot of the exact line where parameters are actually undefined already)

To Reproduce

It's hard to reproduce issue while happening in rare cases due to some race.
but sometimes when modal is disposed parameres are empty and line displayed in the screenshot is crashing app.

Expected behavior

Just check that parameters are not undefined before using them.

Actual Behavior

Exception.

Screenshots

Lines 55 and 60