fix: TTL-836 customer duplicated error message#999

mmaquina merged 2 commits intomasterioet/time-tracker-ui:masterfrom

TTL-836-fix-error-message-when-trying-to-create-a-customer-whose-name-already-existsioet/time-tracker-ui:TTL-836-fix-error-message-when-trying-to-create-a-customer-whose-name-already-existsCopy head branch name to clipboard