Asset Browser Search View Column Resizing (#4087)

* Added resizing

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

* Added Signals and Slots for resizing columns

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

* Cleaned up code

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

* Fixed Column Resize when docking

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

* Added constants

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

* Applied Code review feedback

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

* aplied more feedback

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

* Addressed Code Review Comments

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

* Fixing bad merge

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

* Added fix in initialization

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

* Changed header setup sequence

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

Code/Editor/AzAssetBrowser/AzAssetBrowserWindow.h

@@ -53,9 +53,17 @@ public:
 
     static QObject* createListenerForShowAssetEditorEvent(QObject* parent);
 
+
+Q_SIGNALS:
+    void SizeChangedSignal(int newWidth);
+
+protected:
+    void resizeEvent(QResizeEvent* resizeEvent) override;
+
 private:
     void OnInitViewToggleButton();
     void UpdateDisplayInfo();
+
 protected slots:
     void CreateSwitchViewMenu();
     void SetExpandedAssetBrowserMode();