Inkscape icon does not show up on taskbar when running it from install_dir
<!-- Please report new issues at https://inkscape.org/report; this tracker is for staff-confirmed issues only. See our full bug reporting guidelines at https://inkscape.org/contribute/report-bugs/ --> #### Steps to reproduce: <!-- Describe what you did (step-by-step) so we can reproduce: --> if you are a developer you might know the steps already. It happens when testing the changes, - open the application on terminal by navigating to build directory then run install_dir/bin/inkscape - inkscape window will open #### What happened? The opened application functions like it should but it's [icon](https://cdn.iconscout.com/icon/free/png-512/inkscape-569205.png) isn't visible on the taskbar. #### What should have happened? The icon should have showed itself (I am not sure if that is supposed to happen or not but blank looks weird) #### Inkscape Version and Operating System: - Operating System: Ubuntu - Operating System version: 20.04 ![Screenshot_from_2021-04-21_10-38-27](/uploads/b27e06e1e9692e104dfe2c84f1e1ab58/Screenshot_from_2021-04-21_10-38-27.png)
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