Add "Motion Blur" video option

[lopezloo]

This PR adds "Motion Blur" checkbox into video settings. Enabled by default.

Player is in control until setBlurLevel() or setPlayerBlurLevel() is called. Then script is in control until disconnect, resetBlurLevel() or resetMapInfo() being called.

dxGetStatus().SettingBlur can be used to retrieve current player setting.

~~PR is complete but I'm marking it as draft until #2347 gets merged because that PR also adds video option and without having it merged there would be an empty space in GUI~~.

[Pirulax]

Enabled by default.

I think it would be better for it to be opt-in instead. Most people hate MM.

[lopezloo]

Enabled by default.

I think it would be better for it to be opt-in instead. Most people hate MM.

It is enabled in Single Player though.

[github-actions[bot]]

This draft pull request is stale because it has been open for at least 90 days with no activity. Please continue on your draft pull request or it will be closed in 30 days automatically.

[github-actions[bot]]

This draft pull request was closed because it has been marked stale for 30 days with no activity.

[lopezloo]

I'm reopening this pull request since #2347 was merged.

[TheNormalnij]

Hi. I found a bug in settings menu. Checkbox doesn't work for some langs.

Screenshot

[lopezloo]

I have rearranged positions of these options so they shouldn't overlap anymore.