Improve grinding penalty messages

[Sikatsu]

I personally think it's better to show ''%money% * grinding penalty 0.9'' until the limit is reached, where it will then say ''Mob grinding detected''.

Currently it says ''Mob grinding detected'' with a small pause and then ''%money * grinding penalty 0.9'', but if you kill fast enough there is no way to see how much money you received.

This will hopefully make an afford for players to better be informed.