Judy Slater, longtime comptroller at Fox News Channel, was let go for what the company called “abhorrent behavior" that included allegedly making derogatory comments toward African-American employees. The allegations had come to light in recent weeks, according to the network. The incidents were brought to the attention of company HR chief Kevin Lord within the last two months; Slater, who had been with the company 19 years, was terminated within two weeks, according to a…