If currently someone sets Super_L key for opening the whiskermenu, then the rest keyboard shortcuts which contain Super key are swallowed. For example if someone has set Super+D for "Show Desktop" then it won't work anymore. Brisk-menu fixed that properly in version 4.5 (https://github.com/solus-project/brisk-menu) do you believe you can do the same? I don't know what libraries and stuff is brisk menu using, but maybe you can dig into the commits and find some similar hack.
I'm sorry, but no. Whisker Menu does not handle the keyboard shortcut to show it, so there is no way to add a hack to make that work. The keyboard shortcuts are handled elsewhere in the Xfce stack.
Hmmm I see. I guess the responsible component is xfce4-settings right? In the brisk-menu release, it says that it requires changes in mate-settings-daemon too in order to work completely. So, maybe you can get the fixes from there? If that's the case maybe I should do a new bug report under xfce4-settings? You might find useful the discussions here: https://github.com/solus-project/brisk-menu/issues/55 https://github.com/albertlauncher/albert/pull/479 https://github.com/mate-desktop/mate-settings-daemon/pull/179/files