show keyboard shortcut when hovering over buttons

It would be helpful if, when hovering over buttons or actions in RemNote, the system displayed the corresponding keyboard shortcut. While keyboard shortcuts can be found in the settings, this feature would keep them in front of us, eliminating the need to search. It would also help users discover shortcuts they might not know about.

Over time, this would help users remember shortcuts more intuitively and streamline their overall experience. For example, instead of repeatedly searching for or manually clicking buttons, users could quickly learn and adopt shortcuts, especially for repeated tasks, making navigation quicker and more efficient.