Allow the creation of new personal symbols (not custom icon)
Being able to specify a custom icon for a card is very useful, but there are times when you may wish to use the same custom icon in many different cards. In this case specifying the same image as a a custom icon over and over again on different cards is very inefficient as the data for the same image is saved over and over again in the database.
It would be useful to be able to import an image and save it as a custom icon, that could then be referenced by any card. There could either be an option to chose one of the seven existing groups for the icon, or a new group of "custom" could be used.