[gimp] app: make moving vectors with keyboard arrows multi-selection aware.

[Jehan <jehanp src gnome org>]

commit 789f52c4127ee55cdd58f2de7cafda618fe53fce
Author: Jehan <jehan girinstud io>
Date:   Wed Oct 19 15:41:23 2022 +0200

    app: make moving vectors with keyboard arrows multi-selection aware.
    
    And this is one less usage of gimp_image_get_active_vectors()!

 app/tools/gimpeditselectiontool.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)
---
diff --git a/app/tools/gimpeditselectiontool.c b/app/tools/gimpeditselectiontool.c
index f77060cefe..c10b62adb1 100644
--- a/app/tools/gimpeditselectiontool.c
+++ b/app/tools/gimpeditselectiontool.c
@@ -1071,19 +1071,25 @@ gimp_edit_selection_tool_translate (GimpTool          *tool,
       break;
 
     case GIMP_TRANSFORM_TYPE_PATH:
-      active_item = GIMP_ITEM (gimp_image_get_active_vectors (image));
+      selected_items = gimp_image_get_selected_vectors (image);
+      selected_items = g_list_copy (selected_items);
 
       edit_mode = GIMP_TRANSLATE_MODE_VECTORS;
       undo_type = GIMP_UNDO_GROUP_ITEM_DISPLACE;
 
-      if (! active_item)
+      if (selected_items == NULL)
         {
-          null_message = _("There is no path to move.");
+          null_message = _("There are no paths to move.");
         }
-      else if (gimp_item_is_position_locked (active_item,
-                                             &locked_item))
+      else
         {
-          locked_message = _("The selected path's position is locked.");
+          for (iter = selected_items; iter; iter = iter->next)
+            if (gimp_item_is_position_locked (iter->data, NULL))
+              {
+                locked_item    = iter->data;
+                locked_message = _("A selected path' positions is locked.");
+                break;
+              }
         }
       break;