Fix many icon related things

...tings-mail-messages/client/stylesheets/mail-messages.less

...channel-settings/client/stylesheets/channel-settings.less

packages/rocketchat-lib/client/MessageAction.coffee

packages/rocketchat-lib/client/defaultTabBars.js

...s/rocketchat-livechat/app/client/stylesheets/fontello.css

packages/rocketchat-otr/client/rocketchat.otr.room.js

packages/rocketchat-otr/client/stylesheets/otr.less

packages/rocketchat-otr/client/tabBar.js

...h-notifications/client/stylesheets/pushNotifications.less

packages/rocketchat-push-notifications/client/tabBar.js

packages/rocketchat-theme/assets/stylesheets/base.less

packages/rocketchat-theme/assets/stylesheets/fontello.css

packages/rocketchat-theme/assets/stylesheets/rtl.less

...s/rocketchat-theme/assets/stylesheets/utils/_chatops.less

packages/rocketchat-ui-admin/admin/rooms/adminRooms.html

packages/rocketchat-ui-admin/admin/users/adminUsers.html

packages/rocketchat-ui-login/login/services.html

packages/rocketchat-ui-message/message/messageBox.html

private/fontello.json

private/images/fontello.svg