[gtk] Use the IEC power symbols for GtkSwitch labels

[Emmanuele Bassi <ebassi src gnome org>]

commit ba9b0c6f7d3237e77318bec4c546abaa7c212375
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Fri Jan 11 15:21:09 2019 +0000

    Use the IEC power symbols for GtkSwitch labels
    
    Unicode 9.0 introduced glyps for the "on" and "off" power states, in the
    form of:
    
     - U+23FD POWER ON SYMBOL, or ⏽
     - U+2B58 HEAVY CIRCLE, or ⭘
    
    With `HEAVY CIRCLE` as "power off symbol" selected to avoid adding yet
    another circle to the standard.
    
    Since we moved GtkSwitch to always show glyphs instead of (translatable)
    strings, asking the localisation teams to either come up with a suitable
    short string to replace the English "ON" and "OFF", or to fall back to
    Unicode glyphs, we should ensure we're using the appropriate symbols to
    begin with.
    
    See also: gtk!503 for the corresponding gtk-3-24 change.

 gtk/gtkswitch.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkswitch.c b/gtk/gtkswitch.c
index 0426fc1997..abc37ab863 100644
--- a/gtk/gtkswitch.c
+++ b/gtk/gtkswitch.c
@@ -639,10 +639,10 @@ gtk_switch_init (GtkSwitch *self)
   gtk_widget_add_controller (GTK_WIDGET (self), GTK_EVENT_CONTROLLER (gesture));
   priv->pan_gesture = gesture;
 
-  priv->on_label = gtk_label_new ("❙");
+  priv->on_label = gtk_label_new ("⏽");
   gtk_widget_set_parent (priv->on_label, GTK_WIDGET (self));
 
-  priv->off_label = gtk_label_new ("○");
+  priv->off_label = gtk_label_new ("⭘");
   gtk_widget_set_parent (priv->off_label, GTK_WIDGET (self));
 
   priv->slider = gtk_gizmo_new ("slider", NULL, NULL, NULL);