[gnome-builder] project-tree: remove panel on unload

[Christian Hergert <chergert src gnome org>]

commit edf2e765640dee160d15757fabd09b0b764b720d
Author: Christian Hergert <chergert redhat com>
Date:   Sun Dec 13 18:41:33 2015 -0800

    project-tree: remove panel on unload

 plugins/project-tree/gb-project-tree-addin.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/plugins/project-tree/gb-project-tree-addin.c b/plugins/project-tree/gb-project-tree-addin.c
index 2086e51..b19f174 100644
--- a/plugins/project-tree/gb-project-tree-addin.c
+++ b/plugins/project-tree/gb-project-tree-addin.c
@@ -85,10 +85,11 @@ static void
 gb_project_tree_addin_unload (IdeWorkbenchAddin *addin,
                               IdeWorkbench      *workbench)
 {
+  GbProjectTreeAddin *self = (GbProjectTreeAddin *)addin;
   IdePerspective *editor;
   GtkWidget *pane;
 
-  g_assert (IDE_IS_WORKBENCH_ADDIN (addin));
+  g_assert (IDE_IS_WORKBENCH_ADDIN (self));
   g_assert (IDE_IS_WORKBENCH (workbench));
 
   editor = ide_workbench_get_perspective_by_name (workbench, "editor");
@@ -97,6 +98,8 @@ gb_project_tree_addin_unload (IdeWorkbenchAddin *addin,
   pane = ide_layout_get_left_pane (IDE_LAYOUT (editor));
   g_assert (pane != NULL);
 
+  ide_layout_pane_remove_page (IDE_LAYOUT_PANE (pane),
+                               gtk_widget_get_parent (GTK_WIDGET (self->tree)));
 }
 
 static void