about the mint leaf icon
what's it purpose? i figured it would let me know when i have mature coins but when i hovered over it and it said no blocks ready for minting then i generate 4 blocks in 2-3 minutes

Thats because it only sais "ready" when it knows for sure that one is ready. In case a block gets minted and sent out its no longer ready. This is only for you to not always unlock your wallet because being unsure what might happen.