Steps to reproduce:
- Go to the inbox without selecting any e-mail
- Click on the greyed-out button "Mark" in the upper right corner
The drop-down menu containing the marking options opens. Although these marking options are also greyed-out, this suggests erroneously that the function "Mark" is not disabled at the moment although it actually is. This in turn confuses the user.
Clicking on a grayed-out button should not lead to anything so that it is really clear that the button is currently disabled.