Gallery Manager Tool UI suggests error but only ask for input

Newbies in the training are often at first confused when using the Essentials UI of the tools. The initial screen of the Gallery Manager for example (see GM-UI-1.png) shows a red field that has a value in it ("myimageset"). They think there is an error and don't know what to do. I would improve it this way:

• don't use such an alarming "this-is-an-error" color for fields that not yet have a value. Maybe no coloring at all is good enough.
• make the suggestion in the field meaningful, e.g. "enter a name for a new image set"
• the color of the "Create new imageset" button now changes from light green (not active) to darker green (button can now be used). Change this to a light grey button that changes to green. That will be much clearer. Give the button a tooltip when inactive: "Enter a name for the new Image Set first".