Add relation between client cache and user’s token

Fix the roles not being respected on user creation

Closes #5537

API group fixes

fix flex-nav z-index

API Groups rename fix

Allow the text of attachments to be collapsed

Fix making the internal Hubot init() function always debounced

groups rename was returning a channel object, when it was supposed to return a group object

Fix private groups not being able to be unarchived via the rest api

fix new-message font color

fix favicons and add an option to enable svg