[gnome-boxes] (6 commits) ...welcome-tutorial: Make the title text bigger (x2.2)

[Felipe Borges <felipeborges src gnome org>]

Summary of changes:

  8f4e1c6... welcome-tutorial: Prevent dialog from resizing (*)
  05a8b1d... welcome-tutorial: Request an arbitrary size for the dialog  (*)
  2e82920... welcome-tutorial: Move the titles further away from the gra (*)
  d292cfb... welcome-tutorial: Tweak the size of the pagination buttons (*)
  f6a857a... welcome-tutorial: Use our own CSS class for the text (*)
  146fce7... welcome-tutorial: Make the title text bigger (x2.2) (*)

(*) This commit already existed in another branch; no separate mail sent