[Bug 1775000] [NEW] Opera web-browser. I don t see close and minimalisation windows button

[Pavol]

Public bug reported:

I use fully actual Ubuntu OS.
On Ubuntu 17 was all OK.

You very good understand of issue, if I send you srceenshot
https://i.imgur.com/r3TgHIA.png

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  Opera web-browser. I don t see close and minimalisation windows button

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