RACHEL SAVAGE WITH online abuse pushing her to quit Twitter, transgender model Munroe Bergdorf has called for social media companies to act faster to tackle racism and transphobia on their platforms. The Black trans model, who said she regularly receives threats and waits hours for racist comments about her to be deleted, called on social media firms to invest in minorities to design algorithms to better protect themselves from abuse. "If you can censor a nipple and a picture gets taken down with a nipple on it straight away ... then why can't you develop an algorithm that targets transphobic…