Impossible to remove changed or new files from the index using the "Commit" dialog #133
Description
Currently it is only possible to add modified or new files to the git index using the "Commit" dialog and its "Update Index" functionality. Attempting to remove a changed or new file from the index fails silently (the index is left unchanged and the dialog closes).
To fix: correctly update the index with the current checkbox selection from the "Commit" (or "Amend") dialog when using the "Update Index" function.