add numbers to characters instances in the gamenu
Description of problem: if there're more instances of characters running, it's hard to distinguish which menu item is referencing to what window.
Version-Release number of selected component (if applicable): gnome-characters-3.32.1-2.fc30.x86_64
How reproducible: always
Steps to Reproduce:
- launch several instances of characters
- open the characters ga menu
Actual results: please see attached screenshot
Expected results: the instances are distinguishable by adding unique number to their names, for example.
Additional info: