Gas price not updated unless it's higher

[JonathonDunford]

Issue by freeatnet Sunday Jan 14, 2018 at 12:32 GMT Originally opened as https://github.com/forkdelta/forkdelta.github.io/issues/17

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1. Visit ForkDelta while gas price is high
2. Wait for gas prices to drop and ForkDelta to reduce gas price
3. Visit ForkDelta again

Expected: default gas price is reduced accordingly. Observed: gas price is still at old default

Caused by newEthGasPrice > self.config.ethGasPrice in main.js logic of gas price updates.

Suggested:

• Differentiate between user-set gas price and default gas price.
• Use the higher of (default gas price, user-set gas price).