[gthumb] "Modified Date & Time" is appearing untranslated

[Paolo Bacchilega <paobac src gnome org>]

commit 34c96e0f852e4947e09b0ab9a7896011c684016c
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Mar 1 16:53:21 2020 +0100

    "Modified Date & Time" is appearing untranslated
    
    Do not use a context.  Added a comment for the translators.
    
    Fixes https://gitlab.gnome.org/GNOME/gthumb/issues/85

 gthumb/gth-main-default-metadata.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gthumb/gth-main-default-metadata.c b/gthumb/gth-main-default-metadata.c
index fee12bec..986d6680 100644
--- a/gthumb/gth-main-default-metadata.c
+++ b/gthumb/gth-main-default-metadata.c
@@ -39,7 +39,8 @@ GthMetadataInfo file_metadata_info[] = {
        { "standard::display-name", N_("Name"), "file", 1, NULL, GTH_METADATA_ALLOW_EVERYWHERE },
        { "gth::file::display-size", N_("Size"), "file", 2, NULL, GTH_METADATA_ALLOW_EVERYWHERE },
        { "standard::size", N_("Bytes"), "file", 3, NULL, GTH_METADATA_ALLOW_EVERYWHERE },
-       { "gth::file::display-mtime", NC_("the file mtime", "Modified Date & Time"), "file", 4, NULL, 
GTH_METADATA_ALLOW_EVERYWHERE },
+       /* Translators: the file modified time. */
+       { "gth::file::display-mtime", N_("Modified Date & Time"), "file", 4, NULL, 
GTH_METADATA_ALLOW_EVERYWHERE },
        { "standard::fast-content-type", N_("Type"), "file", 5, NULL, GTH_METADATA_ALLOW_EVERYWHERE },
        { "gth::file::is-modified", NULL, "file", 6, NULL, GTH_METADATA_ALLOW_NOWHERE },
        { "gth::file::full-name", N_("Location"), "file", 7, NULL, GTH_METADATA_ALLOW_IN_PRINT | 
GTH_METADATA_ALLOW_IN_FILE_LIST | GTH_METADATA_ALLOW_IN_PROPERTIES_VIEW },