Updated <delete> hotkey to <shift + delete>

Form1.cs

@@ -348,7 +348,7 @@ namespace photo_sorter
                     case Keys.Enter:
                         sort_image();
                         return true;
-                    case Keys.Delete:
+                    case Keys.Shift | Keys.Delete:
                         delete_image();
                         return true;
                     case Keys.Shift | Keys.Enter:
@@ -613,7 +613,7 @@ namespace photo_sorter
 
         private void globalHotkeysListToolStripMenuItem_Click(object sender, EventArgs e)
         {
-            MessageBox .Show("Global Hotkeys\n\nPgUp == Previous image\nPgDn == Next image\nCtrl + Home == Go to first unsorted image\nCtrl + End == Go to final unsorted image\n\nEnter == Sort photo to current options\n\nDelete OR Shift + Enter == Delete image\n");
+            MessageBox .Show("Global Hotkeys\n\nPgUp == Previous image\nPgDn == Next image\nCtrl + Home == Go to first unsorted image\nCtrl + End == Go to final unsorted image\n\nEnter == Sort photo to current options\n\nShift + Delete OR Shift + Enter == Delete image\n");
         }
 
         private void tsi_enableGlobalHotkeys_Click(object sender, EventArgs e)