[gimp-web/testing] Updated forgotten TODO.

[Jehan <jehanp src gnome org>]

commit fafa4003104a2cd908b20e1690b65c66d5eda553
Author: Jehan <jehan girinstud io>
Date:   Sun Apr 7 19:25:42 2019 +0200

    Updated forgotten TODO.
    
    I took the feature description from:
    https://mail.gnome.org/archives/gimp-user-list/2019-March/msg00000.html

 content/news/2019-04_GIMP-2.10.10_Released/index.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/content/news/2019-04_GIMP-2.10.10_Released/index.md 
b/content/news/2019-04_GIMP-2.10.10_Released/index.md
index e6821e8d..837b62dc 100644
--- a/content/news/2019-04_GIMP-2.10.10_Released/index.md
+++ b/content/news/2019-04_GIMP-2.10.10_Released/index.md
@@ -90,7 +90,9 @@ Ell improved various shortcomings on several transformation tools:
   corresponding options of the _Unified Transform_ tool.
 * New "Readjust" button in several transformation tools to readjust
   transform handles based on the current zoom level.
-* TODO: linking/unlinking of normal/corrective modes.
+* Forward and backward transform directions can be linked, which allows
+  moving the handles without affecting the transformation, letting you
+  manually readjust their position.
 
 <p>
 <video width="992" height="720" controls>