Hi- will be nice to have the ability to assign a colour to the folder (via right click on it and select from colour palette) - that will help to spot the folders pretty swiftly mainly when you have lots of folders/labels in your Gmail.
@Gary is there a way you can tag this thread of mine from Mail to Feature Request now? As you know the later option was not available when I created this post.
You can do it since you created this thread. Edit the original post and change the category.
hmm, I tried that before writing to you, don’t seem to find the edit option 
You should see an edit icon next to the title of your original post.
Clicking on the edit icon should give you options like this:
Or maybe just create a new one, and I will ask a moderator to delete this thread on Monday.
Probably better that way now we have all these other comments.
Not having the pencil edit option against my post, so created a new one under ‘Feature Request’ category, will create some more for those I had to prefix as Idea under Mail category earlier. Thanks mate.