[Bug 1836975] Re: bluebird-gtk-theme 1.3-1 window borders incompatible with Cinnamon >= 3.8 and don't appear in the theme application menu

[Ubuntu Foundations Team Bug Bot]

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the attachment isn't a patch, please remove the "patch" flag from the
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** Tags added: patch

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https://bugs.launchpad.net/bugs/1836975

Title:
  bluebird-gtk-theme 1.3-1 window borders incompatible with Cinnamon >=
  3.8 and don't appear in the theme application menu

Status in bluebird-gtk-theme package in Ubuntu:
  In Progress
Status in bluebird-gtk-theme source package in Disco:
  In Progress
Status in bluebird-gtk-theme source package in Eoan:
  In Progress

Bug description:
  [Impact]

  The Cinnamon package shipped in the Ubuntu 19.04 repositories is >=
  Cinnamon 3.8. This version of Cinnamon only supports window border
  themes which are metacity-3 compliant [1].

  The Bluebird theme's upstream git repository has already been updated
  with metacity-3 compliance [2] but this change has not made its way
  into the Ubuntu package.

  This means that while the package is installable, the theme will not
  be selectable in Cinnamon's Theme application for selecting window
  borders (it won't even appear as an option).

  [Test Case]

  Install `bluebird-gtk-theme`, open the "Themes" application and click
  on "Window Borders"

  Expected result: Bluebird window borders appear as an option, may be
  selected, and the window borders activate.

  Actual result: Bluebird window borders are absent from the window
  borders selection menu.

  [Regression Potential]

  This doesn't modify any of the rest of the theme, but only installs
  metacity-3 support. In using the theme I haven't experienced any
  oddities.

  [1] https://blog.linuxmint.com/?p=3557 Change log entry: "Titlebar
  themes are now restricted to metacity-3"

  [2]
  https://github.com/shimmerproject/Bluebird/commit/12af472e008100153429c88eff8cd3d546b017e9

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