Add mwgens to ec download

[roed314]

Fixes #6184. I've added this to purple, so compare

• https://purple.lmfdb.xyz/EllipticCurve/Q/?download=1&query={%27conductor%27:%20{%27$gte%27:%201,%20%27$lte%27:%20100},%20%27rank%27:%201}&conductor=1-100&rank=1
• https://beta.lmfdb.org/EllipticCurve/Q/?download=1&query={%27conductor%27:%20{%27$gte%27:%201,%20%27$lte%27:%20100},%20%27rank%27:%201}&conductor=1-100&rank=1

[AndrewVSutherland]

The two links above give the same result (neither includes MW generators, because this columns is not selected by default, you have to select it and then click download), but testing it in the usual way shows that it works.

[roed314]

Oops! Thanks.