[libhandy] (9 commits) Non-fast-forward update to branch tab-fixes

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'tab-fixes' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  35f9425... tab-box: Null-check drag icon in drag_end()
  762c264... Specify tab minimum width in code rather than css
  c330b2c... tab: Make sure buttons don't interfere with scrolling
  3bf82b3... tab: Stop spinner when not visible
  424aace... tab-box: Don't hide placeholder tab
  ffd677d... tab-box: A small cleanup

Commits added to the branch:

  d1dbaf1... clamp: Measure even without a child (*)
  b7b06dd... clamp: Always measure with CSS (*)
  1415b56... preferences-page: Tweak margins and spacing (*)
  079441d... tab-box: Null-check drag icon in drag_end()
  e7b02dc... Specify tab minimum width in code rather than css
  1aec2da... tab: Make sure buttons don't interfere with scrolling
  dc5c553... tab: Stop spinner when not visible
  3c86f08... tab-box: Don't hide placeholder tab
  315fd44... tab-box: A small cleanup

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