Pressing Enter/Return Key While File Browse Widget is Focused Opens File Browser (#3304)

* Pressing enter or return opens file browse dialog on browse edit widgets

Signed-off-by: nggieber <nggieber@amazon.com>

* Remove unused header

Signed-off-by: nggieber <nggieber@amazon.com>

Code/Tools/ProjectManager/Source/FormBrowseEditWidget.h

@@ -24,6 +24,9 @@ namespace O3DE::ProjectManager
         explicit FormBrowseEditWidget(const QString& labelText = "", QWidget* parent = nullptr);
         ~FormBrowseEditWidget() = default;
 
+    protected:
+        void keyPressEvent(QKeyEvent* event) override;
+
     protected slots:
         virtual void HandleBrowseButton() = 0;
     };