Sets the maximum allowed length of the contents of the widget. If
the current contents are longer than the given length, then they
will be truncated to fit.
the maximum length of the entry, or 0 for no maximum.
(other than the maximum length of entries.) The value passed in will
be clamped to the range 0-65536.
Sets the maximum allowed length of the contents of the widget. If the current contents are longer than the given length, then they will be truncated to fit.