[gnome-software] gs-loading-page: Port to the new unknown progress support

[Richard Hughes <rhughes src gnome org>]

commit 83b6768214f6c935baf8d6f4341134e5ca403013
Author: Philip Withnall <withnall endlessm com>
Date:   Tue Apr 28 18:30:08 2020 +0100

    gs-loading-page: Port to the new unknown progress support
    
    It already supported unknown progress, by assuming that 0% progress meant
    the progress was unknown. This commit formalises that a bit more.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    Helps: #276

 src/gs-loading-page.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/gs-loading-page.c b/src/gs-loading-page.c
index db0a598e..fef7da38 100644
--- a/src/gs-loading-page.c
+++ b/src/gs-loading-page.c
@@ -74,7 +74,8 @@ gs_loading_page_status_changed_cb (GsPluginLoader *plugin_loader,
                        g_source_remove (priv->progress_pulse_id);
                        priv->progress_pulse_id = 0;
                }
-               if (gs_app_get_progress (app) == 0) {
+
+               if (gs_app_get_progress (app) == GS_APP_PROGRESS_UNKNOWN) {
                        priv->progress_pulse_id = g_timeout_add (50, _pulse_cb, self);
                } else {
                        gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (priv->progressbar),