Don't add Buffer button when Twitter RT button is disabled (reverted from commit ef5b1403f8fd4ef15cc23f2d68b3c6641e790636)
Don't add Buffer button when Twitter RT button is disabled (reverted from commit ef5b1403f8fd4ef15cc23f2d68b3c6641e790636)

bufferapp/buffer-extension-shared,bufferapp/buffer-extension-shared