Rearchitecture Project Manager Screens Workflow and Create Project Settings Ctrl

* Renamed UX screen files and classes to include screen in the name

* Changed screens to emit a screen change request a controller can connect to

* Made ScreensCtrl that owns and manages screens and their changing and history

* Made Project Settings Control managing back and next buttons

* Add Project Setting Model and moved New Project Settings Ui into Screen file

* Goto previous screen always works

* Removed unnecessary QObject namespace from connect calls

* Merged ProjectSettingsModel into ProjectInfo

Code/Tools/ProjectManager/Source/ProjectManagerWindow.ui

@@ -14,11 +14,7 @@
    <string>O3DE Project Manager</string>
   </property>
   <widget class="QWidget" name="centralWidget">
-   <layout class="QVBoxLayout" name="verticalLayout">
-    <item>
-     <widget class="QStackedWidget" name="stackedScreens"/>
-    </item>
-   </layout>
+   <layout class="QVBoxLayout" name="verticalLayout"/>
   </widget>
   <widget class="QMenuBar" name="menuBar">
    <property name="geometry">