All of sudden, one of my android studio projects (structure) started showing a icon (like a check sign) on the right side of a folder.
I've already search on Internet and documentation (http://www.jetbrains.com/idea/webhelp/symbols.html) but was unable to find it.
I do not know if this "additional" icon is related with the file structure (what exaclty?) or some property that I changed (which one?) or something related with version control? or if I will have unexpected side effects because of it?
Does anyone nows the meaning? and how to revert\remove it?