Fix windows taskbar context menu not popping up correctly

Closes ppy#17965.

Note that this will cause a second osu! icon to appear after running the
application (after any update). As per the inline comment, this will
eventually be resolved via clowd/Clowd.Squirrel#24.

I do think having context menus working is more important than duplicate
icons.

Note that for anyone who already has a pinned taskbar icon, it will need
to be manually unpinned and repinned after a future update to actually
fix this issue.

Thanks to @caesay for help with investigation.

osu.Desktop/Program.cs

@@ -123,7 +123,12 @@ private static void setupSquirrel()
                 tools.RemoveUninstallerRegistryEntry();
             }, onEveryRun: (version, tools, firstRun) =>
             {
-                tools.SetProcessAppUserModelId();
+                // While setting the `ProcessAppUserModelId` fixes duplicate icons/shortcuts on the taskbar, it currently
+                // causes the right-click context menu to function incorrectly.
+                //
+                // This may turn out to be non-required after an alternative solution is implemented.
+                // see https://github.com/clowd/Clowd.Squirrel/issues/24
+                // tools.SetProcessAppUserModelId();
             });
         }