Defines which function is assigned to the quick action button next to the upper right corner of the entry mask. Possible values are: LinkToVirtualEntry, CopyData, LoudnessMeter, Player, EditBeatMarkers, EditDefinitions, DeleteEntry, Sequoia. The configured action is removed from the actions menu which is displayed when the "..." button is clicked.

Since DBM 5.8.8199.0, the configuration value "none" is allowed. It removes the quick action button and leaves more space for tabs.
Possible values: see text
Default value: LinkToVirtualEntry