Entering complex coefficients in the coefficient tab crashes the app

[chipmuenk]

This only happens when values are entered manually, not when a filter becomes complex valued e.g. by editing the poles and zeros
File "d:\daten\design\python\git\pyfda\pyfda\input_widgets\filter_coeffs.py", line 242, in setModelData
self.parent.ba[index.column()][index.row()] = data # and in self.ba
TypeError: can't convert complex to float

[chipmuenk]

Fixed in v0.1.2