test: add `setTitlebarOverlay` spec (#34221)
test: add `setTitlebarOverlay` spec (#34221)

spec: add setTitlebarOverlay spec
gerhardberger/electron,gerhardberger/electron,electron/electron,electron/electron,gerhardberger/electron,gerhardberger/electron,gerhardberger/electron,electron/electron,gerhardberger/electron,gerhardberger/electron,electron/electron,electron/electron,electron/electron,electron/electron