[gnome-todo] plugin-dialog-row: Use "extension" instead of "plugin"

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 38f618349ebc27c510cd7dc7ac0f574f396424f6
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Mar 7 21:17:13 2018 -0300

    plugin-dialog-row: Use "extension" instead of "plugin"
    
    Issue: #139

 src/gtd-plugin-dialog-row.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/gtd-plugin-dialog-row.c b/src/gtd-plugin-dialog-row.c
index 721f865..75156f4 100644
--- a/src/gtd-plugin-dialog-row.c
+++ b/src/gtd-plugin-dialog-row.c
@@ -94,7 +94,7 @@ loaded_switch_changed (GtdPluginDialogRow *row)
   if (!success)
     {
       gtk_widget_set_tooltip_text (row->error_image,
-                                   switch_active ? _("Error loading plugin") : _("Error unloading plugin"));
+                                   switch_active ? _("Error loading extension") : _("Error unloading 
extension"));
 
       /* Return the switch to it's original state, without
        * hearing the notify::active signal.