Web Layout Editor loose ends

[jng]

The Web Layout editor in Maestro 3.0 has some loose ends that require fixing up:

• Adding new commands will correctly add the corresponding entries in the menus toolbar, but the labels are blank.
• Moving menu items up and down should retain selection
• Menu items should be able to be relocated by dragging and dropping
• Though the spec may indicate otherwise, flyout menus only nest one level deep. Ensure this is enforced.
• The button in the Invoke URL command editor that should launch a layer selector does not work.
• Icons should be shown beside each command, or at least show icons for the custom commands (Invoke URL, Search, Invoke Script)

[jng]

Fixed r5472