[gimp/gimp-2-10] Rename misleading Lossless string

[Jehan <jehanp src gnome org>]

commit f43f0546df003b854d8c6bb15c2f9e937cdcc3d4
Author: Daniel Novomesky <dnovomesky gmail com>
Date:   Mon Sep 14 08:50:50 2020 +0200

    Rename misleading Lossless string
    
    The lossless option does not provide true lossless encoding yet, unfortunately.
    We must rename the string to correctly inform users that the compression is not 100% lossless,
    Technically the image gets converted from RGB to YUV420 format (which is lossy operation itself) and only 
afterwards the data are compressed lossless-ly.

 plug-ins/common/file-heif.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plug-ins/common/file-heif.c b/plug-ins/common/file-heif.c
index 9ccef10d62..0d1b74685b 100644
--- a/plug-ins/common/file-heif.c
+++ b/plug-ins/common/file-heif.c
@@ -1980,7 +1980,7 @@ save_dialog (SaveParams *params,
   frame = gimp_frame_new (NULL);
   gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
 
-  lossless_button = gtk_check_button_new_with_mnemonic (_("_Lossless"));
+  lossless_button = gtk_check_button_new_with_mnemonic (_("Nearly _lossless (YUV420 format)"));
   gtk_frame_set_label_widget (GTK_FRAME (frame), lossless_button);
 
   hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);