"Remove Threats" button clickable in wrong situation

[ChristophNiehoff]

After every player has passed, but before a new card has been drawn, the "Remove Threat" button is still clickable.
The UI suggests that everything is ok, but the threat does not get removed in this corner case.

I believe it is due to

if (hasPlayerPassed(G, ctx) || (threat.owner !== ctx.playerID)) {
  return INVALID_MOVE;
}

in deleteThreats() in moves.js. One is still at a point, where hasPlayerPassed() returns true.

We should disable the Remove Threats button in this case, like done e.g. with the Add Threat button.

[ChristophNiehoff]

The same is also true for the Update Threats button.