Ethereum bridge bugs

[robvanmieghem]

• [x] https://github.com/threefoldfoundation/tft/issues/217
• [x] https://github.com/threefoldfoundation/tft/issues/228
• [x] https://github.com/threefoldfoundation/tft/issues/225

[robvanmieghem]

Released https://github.com/threefoldfoundation/tft/releases/tag/v1.3.3