Toui

What's new:
- Fixing an error that might appear when clicking a button multiple times quickly.

Why a `pre-release`?
- The fix might give rise to other bugs. There is a possibility that the methods `Element.get_files()` and `File.save` might not work properly. Please report any bugs in [issues](https://github.com/mubarakalmehairbi/ToUI/issues).

**Full Changelog**: https://github.com/mubarakalmehairbi/ToUI/compare/v2.4.1...v2.4.2-beta

- Fix
- Use `session.sid` to store user variables

**Full Changelog**: https://github.com/mubarakalmehairbi/ToUI/compare/v2.4.0...v2.4.1

> **Warning**
> This version contains a security vulnerability. You can read about it [here](https://github.com/mubarakalmehairbi/ToUI/security/advisories/GHSA-hh7j-pg39-q563). Please use it with caution or upgrade to v2.4.1.

- Add `Element.get_parent` method
- Fix an error that sometimes appear when using `Page.on_url_request`
- Can get signed in user even when changing URL
- Add `Element.get_unique_selector` method
- Check if `SECRET_KEY` environment variable is already assigned before assigning random key

**Full Changelog**: https://github.com/mubarakalmehairbi/ToUI/compare/v2.3.0...v2.4.0

> **Warning**
> This version contains a security vulnerability. You can read about it [here](https://github.com/mubarakalmehairbi/ToUI/security/advisories/GHSA-hh7j-pg39-q563). Please use it with caution or upgrade to v2.4.1.

- Better error handling
- You can now get the calling element itself as an argument in a Python function
- Sync `<textarea>` value property with its attribute
- Add `Page.get_element_from_selector` method

**Full Changelog**: https://github.com/mubarakalmehairbi/ToUI/compare/v2.2.0...v2.3.0

> **Warning**
> This version contains a security vulnerability. You can read about it [here](https://github.com/mubarakalmehairbi/ToUI/security/advisories/GHSA-hh7j-pg39-q563). Please use it with caution or upgrade to v2.4.1.

Add `Element.get_selected` method.

**Full Changelog**: https://github.com/mubarakalmehairbi/ToUI/compare/v2.1.1...v2.2.0

> **Warning**
> This version contains a security vulnerability. You can read about it [here](https://github.com/mubarakalmehairbi/ToUI/security/advisories/GHSA-hh7j-pg39-q563). Please use it with caution or upgrade to v2.4.1.

Allow sharing app object across Python modules using `set_global_app` and `get_global_app` methods.

**Full Changelog**: https://github.com/mubarakalmehairbi/ToUI/compare/v2.0.1...v2.1.1