[gnome-shell] (34 commits) Non-fast-forward update to branch wip/hadess/welcome-tour

[Bastien Nocera <hadess src gnome org>]

The branch 'wip/hadess/welcome-tour' 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:

  89ef1e7... welcomeDialog: Add “welcome” dialog
  46d2338... main: Show welcome tour dialogue on first start
  a2a644a... WIP: Try to use texture cache directly

Commits added to the branch:

  ac3faac... overviewControls: Remove intermediate box (*)
  b84eb24... workspaceThumbnails: Expand workspaces before scale-in anim (*)
  862b5be... background: Trivial style cleanup (*)
  cfc1f1f... background: Add option to not use background content size (*)
  8eb81ae... overview: Move background to Workspace (*)
  9062d5d... workspace: Clip background (*)
  059ea64... style: Remove workspace padding (*)
  1f3a364... theme: Desaturate system color (*)
  151a104... dash: Only show separator when there are running apps (*)
  698e67c... workspacesView: Fix scroll direction in RTL locales (*)
  1a96fba... Update Brazilian Portuguese translation (*)
  ba2f198... Update Punjabi translation (*)
  add6dfe... status/dwellClick: Remove menu arrow (*)
  ec0d8e3... extensions-tool: Remove menu arrow from extension template (*)
  c635ff4... workspace: Pass params object to LayoutStrategy (*)
  ac7dc62... workspace: Move more things to LayoutStrategy subclass (*)
  8d9a92f... workspace: Make computeLayout() return a layout object (*)
  39e844a... workspace: Refactor layout scale and space calculation (*)
  a4bf447... workspace: Don't store strategy on layout object (*)
  959639b... windowPreview: Cache the boundingBox of the layout manager (*)
  6ae4909... workspace: Use Util.lerp() instead of own _interpolate() (*)
  779e66a... notificationDaemon: Fix icon-choosing logic (*)
  de299f0... workspaceThumbnails: Center thumbnails in workspace navigat (*)
  bc6849c... windowPreview: Track overlay state separately (*)
  5e10bed... windowPreview: Allow titles to overlap other previews (*)
  efa3585... windowPreview: Add (back) application icons (*)
  56c118d... windowPreview: Keep borderCenter always visible (*)
  2bd91e7... workspace: Adjust spacing (*)
  27a4274... workspace: Add some padding around window previews (*)
  30f2741... windowPreviews: Replace border with scale effect (*)
  42c2bf7... windowPreview: Overhaul chrome style (*)
  4fa6878... welcomeDialog: Add “welcome” dialog
  0a7666c... main: Show welcome tour dialogue on first start
  f97d3cf... WIP: Try to use texture cache directly

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