[gnome-builder] editor: show tooltips for open files

[Christian Hergert <chergert src gnome org>]

commit c6a05bfdb4973f8f2659a7d67d304c7c53120b64
Author: Diego Escalante Urrelo <diegoe gnome org>
Date:   Sat Jun 27 01:57:05 2020 -0500

    editor: show tooltips for open files
    
    This imitates the behavior of `IdeTree`, and helps distinguish many
    similar files from each other without resizing the sidebar.

 src/libide/editor/ide-editor-sidebar.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/libide/editor/ide-editor-sidebar.c b/src/libide/editor/ide-editor-sidebar.c
index 6aec4e1b1..c0244c609 100644
--- a/src/libide/editor/ide-editor-sidebar.c
+++ b/src/libide/editor/ide-editor-sidebar.c
@@ -493,6 +493,7 @@ create_open_page_row (gpointer item,
                         "xalign", 0.0f,
                         NULL);
   g_object_bind_property (view, "title", label, "label", G_BINDING_SYNC_CREATE);
+  g_object_bind_property (view, "title", label, "tooltip-text", G_BINDING_SYNC_CREATE);
   g_object_bind_property_full (view, "modified", label, "attributes",
                                G_BINDING_SYNC_CREATE,
                                modified_to_attrs, NULL, NULL, NULL);