problems with Always on Visible Workspace option

[cansozbir]

Distribution (run cat /etc/os-release):
NAME="Pop!_OS"
VERSION="20.04 LTS"
ID=pop
ID_LIKE="ubuntu debian"
PRETTY_NAME="Pop!_OS 20.04 LTS"
VERSION_ID="20.04"
HOME_URL="https://system76.com/pop"
SUPPORT_URL="http://support.system76.com"
BUG_REPORT_URL="https://github.com/pop-os/pop/issues"
PRIVACY_POLICY_URL="https://system76.com/privacy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal
LOGO=distributor-logo-pop-os

Related Application and/or Package Version (run apt policy pop-shell or provide the latest commit if building locally):
pop-shell:
Installed: 0.1.0158955905220.0480c6299
Candidate: 0.1.0158955905220.0480c6299
Version table:
*** 0.1.0158955905220.04~80c6299 1001
1001 http://ppa.launchpad.net/system76/pop/ubuntu focal/main amd64 Packages
1001 http://ppa.launchpad.net/system76/pop/ubuntu focal/main i386 Packages
100 /var/lib/dpkg/status

Issue/Bug Description:
When we right-click an application's top bar, there is an option to show a window on all of the visible workspaces. And there are several situations this option is enabled default (pop-out videos in the Vivaldi browser for example).

1. If I have windows with the option "Always on Visible Workspace" enabled while the pop-shell extension is disabled. Enabling the extension disables this option from all of the windows.

2. If I have windows with the option "Always on Visible Workspace" enabled after the pop-shell extension is enabled. Moving a window anywhere to tile on the screen disables this option.

3. If I have windows with the option "Always on Visible Workspace" enabled after the pop-shell extension is enabled. If I toggle floating mode with Super+G, I can move the window where I want and there is no problem with Always on Visible Workspace option.

Steps to reproduce (if you know):

1. Open a window.
2. Enable Always on Visible Workspace option for that window.
3. Enable the pop-shell extension.
4. You'll notice that the window is not visible on all workspaces anymore.
5. Enable Always on Visible Workspace option for that window again.
6. Change its position on the screen to tile any other place.
7. You'll notice that the window is not visible on all workspaces anymore.

Expected behavior:
Always on Visible Workspace option enabled windows' are should be in the same position and geometry between all workspaces. And I think this is not possible when we are tiling it.
So as explained in the 3rd step,
If we have a window with this option enabled before the pop-shell extension enabled, the pop-shell extension should respect it's option's state and should toggle floating mode before tile it with all windows.

If we have a window with this option enabled after the pop-shell extension enabled, the pop-shell extension should toggle floating mode after making it visible on all workspaces.

Other Notes:

[phil-opp]

It seems like the "Always on Visible Workspace" option also doesn't work with the new stacking feature. Stacked windows are always only shown on one workspace.

[cansozbir]

Actually, it's been a while since I opened this issue and it seems fixed but as @phil-opp said, the "Always on Visible Workspace" option is not working with stacked windows.

[phoerious]

Always on visible workspace does what it was designed for, but the tiling mode doesn't really support it. The window shows up on other workspaces, but it is being ignored by the tiling mechanism, so that the other windows are always on top (or behind) the window. This option should create a fixed tiling region on all workspaces and other windows on those workspaces should tile around the always visible window(s).