feat: Simplify QT-based tray implementaion#121

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Kishi85 wants to merge 2 commits intoLizardByte:masterfrom

Kishi85:simplify-qt-tray

Commits on May 7, 2026

Import adapted QtTrayMenu class from upstream
Kishi85
committed

Commits on May 9, 2026

Integrate upstream QtTrayMenu.h/cpp into tray_linux.cpp
Kishi85
committed