Implement ignoring tracked files with assume-unchanged

When i compile my project i get some of the files changed and source tree is constantly suggesting me to add them to commit. I can't add them to gitignore since they are already being tracked and i can't delete them from repository since without them script won't function.

I tried clicking "Stop Tracking" on context menu of the file, but it tried to remove file from repository, which as i've mentioned not a acceptable in my case.

git has perfect function for that

• git update-index --assume-unchanged <file>
• git update-index --no-assume-unchanged <file>

and that's what really should happen on clicking "Stop Tracking"
Please implement support for assume-unchanged

Without implementing windows with list of ignored files to unignore, it should take 5 minutes to implement