Fix fail messaging for transfer tokens on Brave

[nguyetv]

"during the course of transferring tokens to be able to vote (in the Brave browser). I purchased 100 tokens, and tried to deposit 50. It claimed that this doesn't exceed my available balance... isn't that a good thing? I went back and was able to transfer 40 and then another 10. This was the only way I could complete the transaction."

[dankins]

Is it possible this is an off-by-one issue? Maybe we are setting the approved transfer amount equal to what they want to deposit, but whatever is checking is looking for "less than" instead of "less than or equal" approved tokens?