Fixed RT-16709: TextField/TextArea, on input method composing text, the cursor doesn't move when pressing arrow keys.

diff -r 20f7acfe4378 -r 04216cdebec2 javafx-ui-controls/src/com/sun/javafx/scene/control/skin/TextInputControlSkin.java
--- a/javafx-ui-controls/src/com/sun/javafx/scene/control/skin/TextInputControlSkin.java	Tue Sep 06 14:15:54 2011 +0100
+++ b/javafx-ui-controls/src/com/sun/javafx/scene/control/skin/TextInputControlSkin.java	Tue Sep 06 13:49:36 2011 -0700
@@ -249,6 +249,12 @@
                     pos = endPos;
                 }
                 addHighlight(imattrs, imstart);
+
+                // Set caret position in composed text
+                int caretPos = event.getCaretPosition();
+                if (caretPos >= 0 && caretPos < imlength) {
+                    textInput.selectRange(imstart + caretPos, imstart + caretPos);
+                }
             }
         }
     }