Test proxy type and threshold display

[Tbaut]

Following #490

• The correct proxy type should be displayed under the multisig section when a pure proxy is present (use the ChaosDao multisig as an example since it has 2 multisigs, 1 with Any, 1 with Governance see Show the type of each proxy #79)
• There shouldn't be any proxy type for single multisigs
• The threshold should be displayed correctly for multisig, with and without proxy