[Gimp-gui] GIMP shows a thumbnail in taskbar rather than its icon

[Jehan <jehan girinstud io>]

Hi,

Right now, the GIMP icon in taskbar/alt-tab is either the Wilber icon 
when no image is opened or a thumbnail of the image otherwise.
A Windows user raised the issue that when there are a lot of 
applications opened, it is difficult to find GIMP when it shows a 
thumbnail and would propose to always show the Wilber icon.
Feature request: https://bugzilla.gnome.org/show_bug.cgi?id=707932

A recent proposition has been that we always show the Wilber icon in 
single window mode, and the thumbnails in multi-windows mode with images 
opened.

Though at times I appreciated the idea of showing thumbnails, nowadays I 
am not sure anymore this is that much interesting. As users note, it 
makes it more difficult sometimes to find GIMP windows.

Also I notice that in GNOME 3, there is no taskbar anymore, it groups 
windows per application (which means that alt-tab does not switch 
between several GIMP windows anymore), and it always show the 
application icon (whether in alt-tab or anywhere else).
I could not find any GNOME or FreeDesktop spec though with explicit 
choices over program icons to show in various cases.
I wonder how things have evolved in other Operating Systems, like 
Windows 10 and OSX. Any input?

Moreover I think most alt-tab UI (or alt-~  in GNOME 3) would show 
previews of the windows (bigger than small thumbnail icons) these days, 
no? So the icon thumbnail may appear even more useless or redundant 
here.

Does it still make sense to generate icon thumbnails?

Jehan