Disable Flip board view in Legacy mode (because the view cannot be flipped)

pcbnew/menubar_pcbframe.cpp

@@ -369,9 +369,11 @@ void PCB_EDIT_FRAME::ReCreateMenuBar()
     viewMenu->AppendSeparator();
 
     AddMenuItem( viewMenu, ID_MENU_PCB_FLIP_VIEW,
-                 _( "&Flip View" ), _( "Flips (mirrors) the board view." ),
+                 _( "&Flip Board View" ),
+                 _( "Flips (mirrors) the board view" ),
                  KiBitmap( flip_board_xpm ), wxITEM_CHECK );
 
+
     viewMenu->AppendSeparator();
 
     text = AddHotkeyName( _( "&Switch Canvas to Legacy" ), g_Pcbnew_Editor_Hokeys_Descr,

pcbnew/pcbframe.cpp

@@ -717,7 +717,8 @@ void PCB_EDIT_FRAME::enableGALSpecificMenus()
             ID_TUNE_SINGLE_TRACK_LEN_BUTT,
             ID_TUNE_DIFF_PAIR_LEN_BUTT,
             ID_TUNE_DIFF_PAIR_SKEW_BUTT,
-            ID_MENU_DIFF_PAIR_DIMENSIONS
+            ID_MENU_DIFF_PAIR_DIMENSIONS,
+            ID_MENU_PCB_FLIP_VIEW
         };
 
         bool enbl = IsGalCanvasActive();