[iagno] Add translators comments.

[Arnaud B. <arnaudb src gnome org>]

commit 5a61a15f34b995ba572c143a7a85535de06e633f
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Mon Feb 18 16:22:03 2019 +0100

    Add translators comments.

 data/themes/adwaita.theme.desktop.in       | 1 +
 data/themes/classic.theme.desktop.in       | 1 +
 data/themes/high_contrast.theme.desktop.in | 1 +
 data/themes/sun_and_star.theme.desktop.in  | 1 +
 4 files changed, 4 insertions(+)
---
diff --git a/data/themes/adwaita.theme.desktop.in b/data/themes/adwaita.theme.desktop.in
index 396e540..2422f26 100644
--- a/data/themes/adwaita.theme.desktop.in
+++ b/data/themes/adwaita.theme.desktop.in
@@ -1,5 +1,6 @@
 [Theme]
 Id=adwaita
+# Translators: name of a board graphical theme; similar to Gtk theme name, should probably be kept unchanged
 Name=Adwaita
 
 [Pieces]
diff --git a/data/themes/classic.theme.desktop.in b/data/themes/classic.theme.desktop.in
index 8b25217..4b93ed1 100644
--- a/data/themes/classic.theme.desktop.in
+++ b/data/themes/classic.theme.desktop.in
@@ -1,5 +1,6 @@
 [Theme]
 Id=classic
+# Translators: name of a board graphical theme; copies the look of the most common physical board
 Name=Classic
 
 [Pieces]
diff --git a/data/themes/high_contrast.theme.desktop.in b/data/themes/high_contrast.theme.desktop.in
index fb8f833..413a8f4 100644
--- a/data/themes/high_contrast.theme.desktop.in
+++ b/data/themes/high_contrast.theme.desktop.in
@@ -1,5 +1,6 @@
 [Theme]
 Id=high_contrast
+# Translators: name of a board graphical theme; uses only two colors, one really dark and one really light
 Name=Black and White
 
 [Pieces]
diff --git a/data/themes/sun_and_star.theme.desktop.in b/data/themes/sun_and_star.theme.desktop.in
index f6d931f..31402d4 100644
--- a/data/themes/sun_and_star.theme.desktop.in
+++ b/data/themes/sun_and_star.theme.desktop.in
@@ -1,5 +1,6 @@
 [Theme]
 Id=sun_and_star
+# Translators: name of a board graphical theme; Light player uses a symbolized Sun, Dark player a symbolized 
five-arms star
 Name=Sun and Star
 
 [Pieces]