fix: enter fullscreen from fullWindow does not trigger exitFullWindow

[tapornanan]

Description

Fix #7705

Specific Changes proposed

When the player is playing in full window mode enterFullWindow() and then calls requestFullscreen() but the full window state not get reset

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Change has been verified in an actual browser (Chrome, Firefox, IE)
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

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[gkatsev]

This does make sense on the surface, but fullWindow was originally created as a fallback for lack of native fullscreen support and it's still there at the end of a bunch of if/else statements

video.js/src/js/player.js

Lines 2929 to 2932 in b58a220

	// fullscreen isn't supported so we'll just stretch the video element to
	// fill the viewport
	this.enterFullWindow();
	}

So, a bit weird to exit it only to maybe enter it immediately after.

[tapornanan]

@gkatsev Thanks you

In my case, There was a requirement that we need to load videojs and play the video in fullscreen whenever the user clicked on UI. It works fine on high-end/fast devices but in some case, there is some low-end/slow device that is failed to run requestFullscreen() within valid user gesture time therefore I add an extra check to go full window if the fullscreen is failed. Then we wait for the user to click on the play button in the video we will again trigger requestFullscreen which this time is usually successful because all scripts are already loaded. But the state of videojs is still shown that isFullWindow still true 😢