fix(control-bar): incorrect display when control bar display is locked

[amtins]

Description

The control bar is not displayed correctly when the display is locked because .vjs-lock-showing uses display block instead of flex.

Specific Changes proposed

• use display flex instead of display block when the control bar has .vjs-lock-showing class
• ensure that the control bar is not displayed if the player has classes:
  • .vjs-controls-disabled
  • .vjs-using-native-controls
  • .vjs-error

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

[codecov]

Codecov Report

Merging #8435 (ab67918) into main (b95cd7a) will not change coverage.
Report is 1 commits behind head on main.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #8435   +/-   ##
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  Coverage   82.68%   82.68%           
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  Files         113      113           
  Lines        7578     7578           
  Branches     1821     1821           
=======================================
  Hits         6266     6266           
  Misses       1312     1312           

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[mister-ben]

I think lock showing had only really been considered in terms of menu buttons before. Good to implement it properly here too.