HeliBoard Green Dot

I just noticed that my HeliBoard icon in the list of apps has a green dot to the left of the name below the icon itself. I have no idea what it means -- it seems to be different form the privacy green dot you may get in the top notification area.

Also, I've noticed that when I type, not only do some things get underlined in red (I think it's for misspelling), but also in blue. Any idea what that means?

Thank you