Move the TODO items from the top of gtkdlg.c into the main TODO file.

[originally from svn r7173]

unix/GTK2.TODO

@@ -1,7 +1,7 @@
 TODO for PuTTY GTK2 port before merging back into main trunk code
 -----------------------------------------------------------------
 
-Items from Colin's original mail:
+Things to do before deciding a merge is feasible:
 
  - Font handling is the biggie. Current problems with it:
     * The GTK2 font selection dialog only mentions client-side
@@ -38,6 +38,9 @@ Items from Colin's original mail:
  - Uses of GtkList should be replaced with the non-deprecated
    GtkTreeView.
 
-At point of merge:
+ - Investigate the shortcut mechanism in GTK2's GtkLabel, and see if
+   it's worth switching to it from the current ad-hockery.
+
+Things to do at point of actual merge:
 
  - Mention Colin in the website's licence page.

unix/gtkdlg.c

@@ -2,15 +2,6 @@
  * gtkdlg.c - GTK implementation of the PuTTY configuration box.
  */
 
-/*
- * TODO when porting to GTK 2.0:
- * 
- *  - GtkList is deprecated and we should switch to GtkTreeView instead
- *    (done for GtkTree).
- *  - GtkLabel has a built-in mnemonic scheme, so we should at
- *    least consider switching to that from the current adhockery.
- */
-
 #include <assert.h>
 #include <stdarg.h>
 #include <ctype.h>