When a file is renamed if the name entered by user has a length that
exceeds maximum limit then it shows a window with a warning.

The problem is that once the user has acknowledged the warning, the file
name goes back to its original name. The user is not given a chance to
make slight modifications in the name that was entered.

To fix this problem, a warning will be given in the popup itself where the
new filename is entered. That way the user will be able to make slight
changes so that the file name is within the size limit.

#148