Autobet: Reducing bet "on win" or "lose" go to "zero"

[Xylber]

There is a bug on the automatic bet, if we are playing some kind of martingale (or just decreasing on loss or win), and the bet amount is on the minimum 0.00000001, the half of it became "zero".

The automatic bet should have a limit on 0.0000001 as minimum, or even add a new option that can say "never go below this bet" and "never go above this bet", so I can configure like this:

Start bet: 0.0001 BTC
Increase 100% on lose
Decrease 100% on win
Never go above 0.0064
Never go below 0.000006 BTC