Add an option to set color of (edited) suffix (#660)
Add an option to set color of (edited) suffix (#660)

This option allows a user to set a custom color to the (edited)
suffix on messages that have been edited.
The default color is set to '095', as it was the former choice.
trygveaa/wee-slack,wee-slack/wee-slack,rawdigits/wee-slack