Setting the character truncation limit in the Variable Explorer

[DavidMSou]

Would it be feasible to implement a box where the user can insert the value of the truncation limit (X) in the variable explorer?

spyder-kernels/spyder_kernels/utils/nsview.py

Truncate display at X chars to avoid freezing Spyder

because of large displays

if len(display) > X:
if is_binary_string(display):
ellipses = b' ...'
else:
ellipses = u' ...'
display = display[:70].rstrip() + ellipses