New Control for Valueselection

One of the main descriptors we are using for all of our manually archived documents is the document-type.

Currently in standard the only option is the selection-box, where you can provide multiple values for selection. The downside is, that users first need to click into the control to see all the values, which is one unnecessary click.

We would like to have a control where all the available values are displayed and one can be selected with a single click.

We have implemented this with a workaround using the classification schemes (see screenshot attached), but this involves heavy scripting effort which we want to get rid off.