[pitivi] ui: Escape markup in uri to avoid GTK warnings

[Alexandru Băluț <alexbalut src gnome org>]

commit 3d59a68366dd1c7bb46d64c714310dfb316e7590
Author: Suhas Nayak <suhas2go gmail com>
Date:   Sat Jan 28 05:00:02 2017 +0530

    ui: Escape markup in uri to avoid GTK warnings
    
    GTK otherwise parses uri as markup text.
    
    This fixes T7679
    
    Differential Revision: https://phabricator.freedesktop.org/D1624

 pitivi/utils/ui.py |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/pitivi/utils/ui.py b/pitivi/utils/ui.py
index 3df3d01..a176aee 100644
--- a/pitivi/utils/ui.py
+++ b/pitivi/utils/ui.py
@@ -251,7 +251,8 @@ def beautify_asset(asset):
         asset (GES.Asset): The asset to display.
     """
     uri = get_proxy_target(asset).props.id
-    res = ["<b>" + path_from_uri(uri) + "</b>"]
+    path = path_from_uri(uri)
+    res = ["<b>" + GLib.markup_escape_text(path) + "</b>"]
 
     ranks = {
         DiscovererVideoInfo: 0,