Focus issue in editor settings menu #3921 (#6296)

* Changes to fix DCO

Signed-off-by: John Jones-Steele <82226755+jjjoness@users.noreply.github.com>

* Moved the keyEvent to a helper function for ease of testing

Signed-off-by: John Jones-Steele <82226755+jjjoness@users.noreply.github.com>

* Split definition and declaration of WidgetHandleKeyPressEvent

Signed-off-by: John Jones-Steele <82226755+jjjoness@users.noreply.github.com>

Code/Editor/EditorPreferencesDialog.cpp

@@ -112,6 +112,31 @@ void EditorPreferencesDialog::showEvent(QShowEvent* event)
     QDialog::showEvent(event);
 }
 
+void WidgetHandleKeyPressEvent(QWidget* widget, QKeyEvent* event)
+{
+    // If the enter key is pressed during any text input, the dialog box will close
+    // making it inconvenient to do multiple edits. This routine captures the
+    // Key_Enter or Key_Return and clears the focus to give a visible cue that
+    // editing of that field has finished and then doesn't propogate it.
+    if (event->key() != Qt::Key::Key_Enter && event->key() != Qt::Key::Key_Return)
+    {
+        QApplication::sendEvent(widget, event);
+    }
+    else
+    {
+        if (QWidget* editWidget = QApplication::focusWidget())
+        {
+            editWidget->clearFocus();
+        }
+    }
+}
+
+
+void EditorPreferencesDialog::keyPressEvent(QKeyEvent* event)
+{
+    WidgetHandleKeyPressEvent(this, event);
+}
+
 void EditorPreferencesDialog::OnTreeCurrentItemChanged()
 {
     QTreeWidgetItem* currentItem = ui->pageTree->currentItem();

Code/Editor/EditorPreferencesDialog.h

@@ -19,6 +19,8 @@ namespace Ui
 
 class EditorPreferencesTreeWidgetItem;
 
+void WidgetHandleKeyPressEvent(QWidget* widget, QKeyEvent* event);
+
 class EditorPreferencesDialog
     : public QDialog
     , public AzToolsFramework::IPropertyEditorNotify
@@ -36,6 +38,7 @@ public:
 
 protected:
     void showEvent(QShowEvent* event) override;
+    void keyPressEvent(QKeyEvent* event) override;
 
 private:
     void CreateImages();