Fix assertion when exporting hotkeys. (fixes lp:1479859)

* wxFD_SAVE and wxFD_OPEN cannot be specified when calling wxFileDialog.  it even says so in
  the documentation.

common/hotkeys_basic.cpp

@@ -50,7 +50,7 @@
 wxString g_CommonSectionTag( wxT( "[common]" ) );
 
 
-/* Class to handle hotkey commnands. hotkeys have a default value
+/* Class to handle hotkey commands hotkeys have a default value
  * This class allows the real key code changed by user from a key code list
  * file.
  */
@@ -279,7 +279,7 @@ wxString AddHotkeyName( const wxString& aText, EDA_HOTKEY** aList,
     }
 
 #ifdef USING_MAC_CMD
-    // On OSX, the modifier euqivalent to the Ctrl key of PCs
+    // On OSX, the modifier equivalent to the Ctrl key of PCs
     // is the Cmd key, but in code we should use Ctrl as prefix in menus
     msg.Replace( MODIFIER_CMD_MAC, MODIFIER_CTRL_BASE );
 #endif
@@ -337,7 +337,7 @@ wxString AddHotkeyName( const wxString&           aText,
     }
 
 #ifdef USING_MAC_CMD
-    // On OSX, the modifier euqivalent to the Ctrl key of PCs
+    // On OSX, the modifier equivalent to the Ctrl key of PCs
     // is the Cmd key, but in code we should use Ctrl as prefix in menus
     msg.Replace( MODIFIER_CMD_MAC, MODIFIER_CTRL_BASE );
 #endif
@@ -794,7 +794,7 @@ void EDA_BASE_FRAME::ExportHotkeyConfigToFile( EDA_HOTKEY_CONFIG* aDescList,
                                           ext,
                                           mask,
                                           this,
-                                 wxFD_OPEN | wxFD_SAVE,
+                                          wxFD_SAVE,
                                           true );
 
     if( filename.IsEmpty() )