[gtksourceview/wip/chergert/hoverers] add css class for hover popover

[Christian Hergert <chergert src gnome org>]

commit 69f2cf14324d8456438abc0b092db040602cb042
Author: Christian Hergert <chergert redhat com>
Date:   Tue Mar 9 23:26:33 2021 -0800

    add css class for hover popover

 gtksourceview/gtksourcehoverassistant.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gtksourceview/gtksourcehoverassistant.c b/gtksourceview/gtksourcehoverassistant.c
index e183734d..74bf8818 100644
--- a/gtksourceview/gtksourcehoverassistant.c
+++ b/gtksourceview/gtksourcehoverassistant.c
@@ -122,6 +122,8 @@ gtk_source_hover_assistant_init (GtkSourceHoverAssistant *self)
 {
        GtkEventController *motion;
 
+       gtk_widget_add_css_class (GTK_WIDGET (self), "hover-assistant");
+
        gtk_popover_set_autohide (GTK_POPOVER (self), TRUE);
 
        self->display = g_object_new (GTK_SOURCE_TYPE_HOVER_DISPLAY,