Open gnome-shell-extension-prefs, scroll down to 'Ubuntu Appindicators' and disable it.
I already did, and icon tray stopped stealing click actions.
'Enable Legacy tray icons' is an option of 'Ubuntu Appindicators' extension. You can see it if you click on Settings at 'Ubuntu AppIndicators' extension, but disabling only that setting did not work for me, I had to disable the entire extension.
Open gnome-shell- extension- prefs, scroll down to 'Ubuntu Appindicators' and disable it.
I already did, and icon tray stopped stealing click actions.
'Enable Legacy tray icons' is an option of 'Ubuntu Appindicators' extension. You can see it if you click on Settings at 'Ubuntu AppIndicators' extension, but disabling only that setting did not work for me, I had to disable the entire extension.