v0.2.2 - Better auto-approval process

The auto-approval process is now smarter. If a buy order is placed, the tokens are first bought, then the wallet is approved for selling. If a sell order is placed while the address is not yet approved, it's mandatory to approve first, before selling.

This is only done once per token and per pancakeswap version. The process is smart and only approves on the version that will be used for selling at the best price (when both versions are available).

Added "Buy/sell now" and "Create order" buttons to the "Token added" confirmation message, for even faster buy after adding a new token.