stop script editor from eating undo/redo shortcuts (Fixes #2506)

apps/opencs/view/world/scriptedit.cpp

@@ -25,6 +25,19 @@ CSVWorld::ScriptEdit::ChangeLock::~ChangeLock()
     --mEdit.mChangeLocked;
 }
 
+bool CSVWorld::ScriptEdit::event (QEvent *event)
+{
+    // ignore undo and redo shortcuts
+    if (event->type()==QEvent::ShortcutOverride)
+    {
+        QKeyEvent *keyEvent = static_cast<QKeyEvent *> (event);
+        
+        if (keyEvent->matches (QKeySequence::Undo) || keyEvent->matches (QKeySequence::Redo))
+            return true;
+    }
+    
+    return QPlainTextEdit::event (event);
+}
 
 CSVWorld::ScriptEdit::ScriptEdit (const CSMDoc::Document& document, ScriptHighlighter::Mode mode,
     QWidget* parent)

apps/opencs/view/world/scriptedit.hpp

@@ -53,6 +53,10 @@ namespace CSVWorld
             QFont mDefaultFont;
             QFont mMonoFont;
 
+        protected:
+
+            bool event (QEvent *event);
+            
         public:
 
             ScriptEdit (const CSMDoc::Document& document, ScriptHighlighter::Mode mode,