Change the cubes order to alphabetical when a new cube is created or layout is changed

In the form "New cube" the "Available dimensions" box the current cubes order is by creation date, earliest to latest (see the att. file New cube.png).

In other forms the cubes' lists are ordered alphabetically (e.g. Modeler/<database>/Cubes).

It would be nice to have the alphabetical order when a new cube is created or layout is changed.