W76: Editor SaveSettings + Refresh (MC CK_OptionsSaveMode/CK_Refresh)

Add two remaining MC editor commands:

SaveSettings (CK_OptionsSaveMode): directs user to save via
  F9→Options→Save setup (the filemanager-level config save).

Refresh (CK_Refresh): no-op since TLC redraws every frame.

Added 2 unit tests.

Tests: 1431 pass, zero warnings.

local/recipes/tui/tlc/source/src/editor/menubar.rs

@@ -99,6 +99,10 @@ pub enum EditorCmd {
     WordComplete,
     /// Check spelling of the word at cursor (MC CK_SpellCheck).
     SpellCheck,
+    /// Save current editor settings as default (MC CK_OptionsSaveMode).
+    SaveSettings,
+    /// Redraw the screen (MC CK_Refresh).
+    Refresh,
 }
 
 /// Outcome of a menu-bar key press.
@@ -277,6 +281,8 @@ impl EditorMenuBar {
                     MenuItem::separator(),
                     MenuItem::item("Insert/Overwrite", 'i', EditorCmd::ToggleOverwrite),
                     MenuItem::item("Spell check", 's', EditorCmd::SpellCheck),
+                    MenuItem::separator(),
+                    MenuItem::item("Save settings", 'v', EditorCmd::SaveSettings),
                 ],
             ),
         ];

local/recipes/tui/tlc/source/src/editor/mod.rs

@@ -1296,6 +1296,12 @@ impl Editor {
             EditorCmd::WordComplete => {
                 self.word_complete();
             }
+            EditorCmd::SaveSettings => {
+                self.message = Some("Save via F9→Options→Save setup".to_string());
+            }
+            EditorCmd::Refresh => {
+                // TLC redraws every frame; CK_Refresh is a no-op.
+            }
             EditorCmd::SpellCheck => {
                 let misspelled = self.find_next_misspelled(
                     self.cursor.position(),