Adds multi-step Wizard view (#1783)

* Initial commit for Wizard

* Fixes #1777 - Dialog button justification. Adds unit tests

* Added missing API doc

* Work in progress

* Added tests for wide chars

* Tests

* more tests

* wip

* fixed test that broke by adjusting dialog button alignment

* fixed test that broke by adjusting dialog button alignment

* Fixed Dialogs scenario crash re: Parse v TryParse

* broke tests. can't figure out how.

* Revert "broke tests. can't figure out how."

This reverts commit f3c53928ac.

* Fixed unit tests

* Reverted workaround that doesn't work

* Refactor and cleanup

UICatalog/Properties/launchSettings.json

@@ -6,6 +6,18 @@
     "UICatalog : -usc": {
       "commandName": "Project",
       "commandLineArgs": "-usc"
+    },
+    "Wizards": {
+      "commandName": "Project",
+      "commandLineArgs": "Wizards"
+    },
+    "Dialogs": {
+      "commandName": "Project",
+      "commandLineArgs": "Dialogs"
+    },
+    "Buttons": {
+      "commandName": "Project",
+      "commandLineArgs": "Buttons"
     }
   }
 }