text: Title: Default to adding a newline for everything before the `extra_tooltip_text` when binding an action to a button
  Body: Follow up issue from the feedback at https://github.com/napari/napari/pull/6794#discussion_r1592792932
  
  > Nice! Now wondering if we should default to adding a newline for everything before the `extra_tooltip_text`...
  
  _Originally posted by @brisvag in https://github.com/napari/napari/pull/6794#discussion_r1595128310_
  
  > That makes sense! From a quick check seems like the only other button that has some extra text is pan/zoom:
  > 
  > ![imagen](https://github.com/napari/napari/assets/16781833/be524560-9ccb-4565-896e-0e70e2e56e8c)
  > 
  > Maybe something like `Temporarily re-enable by holding Space` could be used as text in case the extra text is added always in a new line?
  > 
  > ![imagen](https://github.com/napari/napari/assets/16781833/0bf88973-1fef-4560-a55d-c1b4e4a7ef7f)
  > 
  > Also, should an issue be made to tackle that later or maybe is something worthy to be done here?
  
  _Originally posted by @dalthviz in https://github.com/napari/napari/pull/6794#discussion_r1595648027_
  
  > I mean I feel like the new line would be safe as a default...
  > but I don't think I would change it in this PR--if at all. It's easy to add the new line, harder to remove it if someone does want a one-liner.
  
  _Originally posted by @psobolewskiPhD in https://github.com/napari/napari/pull/6794#discussion_r1595982004_