tests: Add tests for ruffle-rs#1671

build(deps): bump syn from 1.0.56 to 1.0.57

Bumps [syn](https://github.com/dtolnay/syn) from 1.0.56 to 1.0.57.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@1.0.56...1.0.57)

Signed-off-by: dependabot-preview[bot] <[email protected]>

webgl: Use mult color for draw_rect (fix ruffle-rs#2189)

avm1: Implement XML.ignoreWhite

core: Fix memory leak caused by unbound text variables

Text fields without variables would return as unbound in
EditText::try_bind_text_field_variable, causing them to be added
to the unbound textfield list even though they had no variable
setting. Return successful bidning by default to avoid adding
these textfields to the unbound list.

desktop: Don't render while minimized

On desktop, don't render while the window is minimized.

In the wgpu backend, don't panic if swap chain fails to grab a
texture. Instead recreate the swap chain and bail on the current
frame.

Fixes panic when minimizing with the wgpu vulkan backend (ruffle-rs#2065).

core: onKeyUp/Down method handlers fire only if clip has focus (fix r…

…uffle-rs#2120)

build(deps-dev): bump webpack-cli from 4.2.0 to 4.3.0 in /web

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 4.2.0 to 4.3.0.
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-cli/compare/[email protected]@4.3.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

build(deps-dev): bump source-map-loader from 1.1.3 to 2.0.0 in /web

Bumps [source-map-loader](https://github.com/webpack-contrib/source-map-loader) from 1.1.3 to 2.0.0.
- [Release notes](https://github.com/webpack-contrib/source-map-loader/releases)
- [Changelog](https://github.com/webpack-contrib/source-map-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/source-map-loader@v1.1.3...v2.0.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

web/desktop: Add basic dialog handling (closes ruffle-rs#1978)