add Bucket#contributionCount computed property that only accepts positive contributions, use in bucket details
add Bucket#contributionCount computed property that only accepts positive contributions, use in bucket details

cobudget/cobudget-ui,data-doge/co-pay-ui,euglazer/co-pay-ui,data-doge/co-pay-ui,euglazer/co-pay-ui,cobudget/cobudget-ui