[gnome-system-monitor/migrateui] Collapse kthreadd by default on linuxes in process tree mode.

[Robert Roth <robertroth src gnome org>]

commit f37aaefe4bf1ef2af00d48d5219b168f9fbb5b78
Author: Robert Roth <robert roth off gmail com>
Date:   Sun Jan 29 10:39:51 2012 +0200

    Collapse kthreadd by default on linuxes in process tree mode.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=667830

 src/proctable.cpp |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/src/proctable.cpp b/src/proctable.cpp
index 0b2e693..5c400e7 100644
--- a/src/proctable.cpp
+++ b/src/proctable.cpp
@@ -679,7 +679,12 @@ insert_info_to_tree (ProcInfo *info, ProcData *procdata, bool forced = false)
             GtkTreePath *parent_node = gtk_tree_model_get_path(model, &parent->node);
             gtk_tree_store_insert(GTK_TREE_STORE(model), &info->node, &parent->node, 0);
 
-            if (!gtk_tree_view_row_expanded(GTK_TREE_VIEW(procdata->tree), parent_node))
+            if (!gtk_tree_view_row_expanded(GTK_TREE_VIEW(procdata->tree), parent_node)
+#ifdef __linux__
+                // on linuxes we don't want to expand kthreadd by default (always has pid 2)
+                && (parent->pid != 2)
+#endif
+            )
                 gtk_tree_view_expand_row(GTK_TREE_VIEW(procdata->tree), parent_node, FALSE);
             gtk_tree_path_free(parent_node);
         } else