[pitivi] project: Marked Ignore Backup button as destructive

[Alexandru Băluț <alexbalut src gnome org>]

commit 08505fb1718dbd39dc46a41ceb0758a76a1f1dfa
Author: MD Ruhulamin Khan <skipperuzumaki gmail com>
Date:   Sun Mar 15 06:42:32 2020 +0000

    project: Marked Ignore Backup button as destructive
    
    Fixes #2418

 pitivi/project.py | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)
---
diff --git a/pitivi/project.py b/pitivi/project.py
index d5008be4..bd629d24 100644
--- a/pitivi/project.py
+++ b/pitivi/project.py
@@ -283,15 +283,11 @@ class ProjectManager(GObject.Object, Loggable):
         Args:
             time_diff (int): The difference, in seconds, between file mtimes.
         """
-        dialog = Gtk.Dialog(title="", transient_for=None)
-        dialog.add_buttons(_("Ignore backup"), Gtk.ResponseType.REJECT,
-                           _("Restore from backup"), Gtk.ResponseType.YES)
-        # Even though we set the title to an empty string when creating dialog,
-        # seems we really have to do it once more so it doesn't show
-        # "pitivi"...
-        dialog.set_title("")
+        dialog = Gtk.Dialog(title="", transient_for=self.app.gui)
+        ignore_backup_btn = dialog.add_button(_("Ignore backup"), Gtk.ResponseType.REJECT)
+        ignore_backup_btn.get_style_context().add_class("destructive-action")
+        dialog.add_button(_("Restore from backup"), Gtk.ResponseType.YES)
         dialog.set_icon_name("pitivi")
-        dialog.set_transient_for(self.app.gui)
         dialog.set_modal(True)
         dialog.set_default_response(Gtk.ResponseType.YES)
         dialog.get_accessible().set_name("restore from backup dialog")