[gtk] text: Reset cursor opacity when unmapping

[Timm Bäder <baedert src gnome org>]

commit c38c5c4ce14d5b4af35b5c5c9b947d83947b4204
Author: Timm Bäder <mail baedert org>
Date:   Mon Dec 30 10:55:03 2019 +0100

    text: Reset cursor opacity when unmapping
    
    Otherwise we might get mapped again with a half-transparent cursor.

 gtk/gtktext.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gtk/gtktext.c b/gtk/gtktext.c
index 3b49ef71ba..b9a763352e 100644
--- a/gtk/gtktext.c
+++ b/gtk/gtktext.c
@@ -2062,6 +2062,8 @@ gtk_text_unmap (GtkWidget *widget)
     _gtk_text_handle_set_mode (priv->text_handle,
                                GTK_TEXT_HANDLE_MODE_NONE);
 
+  priv->cursor_alpha = 1.0;
+
   GTK_WIDGET_CLASS (gtk_text_parent_class)->unmap (widget);
 }