@julienw `text-align: left`is there because in root.css you have this:  `body { text-align: center;  }`. So we have several options:
Remove that rule from root.css (I would not do that ).
We set in sms.css all texts that needs to be left aligned (what I'm proposing).
Add an extra rule in Action menu BB: `h1 { text-align: left; }` (this was not there as `left` is the default value)