Tabs are shown gray background when tab focused, Reworked ProjectsScreen to reuse Widgets instead of recreating it on each update, Sorting projects alphabetically

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

Code/Tools/ProjectManager/Source/ScreensCtrl.cpp

@@ -30,6 +30,7 @@ namespace O3DE::ProjectManager
 
         // add a tab widget at the bottom of the stack
         m_tabWidget = new QTabWidget();
+        m_tabWidget->tabBar()->setFocusPolicy(Qt::TabFocus);
         m_screenStack->addWidget(m_tabWidget);
         connect(m_tabWidget, &QTabWidget::currentChanged, this, &ScreensCtrl::TabChanged);
     }