Work around what seems to be a KDE/Plasma bug. Default GPU works now.

indra/newview/linux_tools/refresh_desktop_app_entry.sh

@@ -45,7 +45,7 @@ PrefersNonDefaultGPU=true
 Actions=NvidiaGPU;AmdGPU;DefaultGPU;AssociateMIME;
 
 [Desktop Action DefaultGPU]
-Exec=${installation_prefix}/${VIEWERNAME,,}
+Exec=env __GLX_VENDOR_LIBRARY_NAME="" ${installation_prefix}/${VIEWERNAME,,}
 Name=Launch on default GPU
 Comment=Launch the viewer using the system's integrated GPU, instead of the dedicated one. (if available)
 PrefersNonDefaultGPU=false