Add tests for tag selector and multiple news selector
Merge branch 'development' of https://github.com/Sitefinity/feather-widgets into development

Conflicts:
	Tests/Feather.Widgets.TestUI.Framework/Framework/ElementMap/News/NewsWidgetContentScreen.cs
	Tests/Feather.Widgets.TestUI.Framework/Framework/Wrappers/Backend/News/NewsWidgetEditContentScreenWrapper.cs
	Tests/FeatherWidgets.TestUI.Arrangements/FeatherWidgets.TestUI.Arrangements.csproj
	Tests/FeatherWidgets.TestUI.TestCases/FeatherWidgets.TestUI.TestCases.csproj
	Tests/FeatherWidgets.TestUI.TestCases/News/DeleteTagAndEditNewsWidget.cs
	Tests/FeatherWidgets.TestUI.TestCases/News/FilterNewsItemWithCustomTaxonomyOnPage.cs
	Tests/FeatherWidgets.TestUI.TestCases/News/Load200TagsAndSearch.cs
	Tests/FeatherWidgets.TestUI.TestCases/News/SearchAndSelectNewsByTag.cs
	Tests/FeatherWidgets.TestUI.TestCases/News/SearchForNotExistingTag.cs
	Tests/FeatherWidgets.TestUI.TestCases/News/SelectNewsItemInNewsWidgetFromPage.cs