#121 Iconless objects not displayed by Ambient panels

[Elena]

If I want to add an object (drawer, tool,...) without icon (default icon) to an Ambient panel, the added object is still functional but only empty space is displayed, instead of the ghosted icon. Be aware, I noticed some randomness with this behaviour though... sometimes, dragging default drawers from RAM: (just for test purposes, like ENV: for example) still results in the default ghosted icon being displayed in the panel. Please investigate and fix it if possible, thanks.