[gnome-builder] flatpak: do not propagate cancellable when installing runtimes

[Christian Hergert <chergert src gnome org>]

commit fe0e3e0361b361a8c1c04a6d8fdd2f75ecaaf269
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jun 30 10:56:40 2019 -0700

    flatpak: do not propagate cancellable when installing runtimes
    
    Related to #927

 src/plugins/flatpak/gbp-flatpak-runtime-provider.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/src/plugins/flatpak/gbp-flatpak-runtime-provider.c 
b/src/plugins/flatpak/gbp-flatpak-runtime-provider.c
index e101f3e43..f49ddb9b7 100644
--- a/src/plugins/flatpak/gbp-flatpak-runtime-provider.c
+++ b/src/plugins/flatpak/gbp-flatpak-runtime-provider.c
@@ -781,8 +781,11 @@ gbp_flatpak_runtime_provider_bootstrap_async (IdeRuntimeProvider  *provider,
     }
   else
     {
+      /* Do not propagate cancellable to this operation or we risk cancelling
+       * in-flight operations that the user is expecting to complete.
+       */
       gbp_flatpak_install_dialog_run_async (dialog,
-                                            cancellable,
+                                            NULL,
                                             gbp_flatpak_runtime_provider_bootstrap_cb,
                                             g_object_ref (task));
     }