fixes view state and err msg
Fix for U4-3831.  Removes form, adds ng-click with $event.preventDefault() to prevent premature saving.
U4-4045 The "Empty" partial view snippet should have @inherits
fixes the protect page logic
Fixes: U4-4010 Member and user session gets mixed - fixes how we detect a back office request + unit tests and added new IsBackOffice attribute
Merge remote-tracking branch 'origin/6.2.0' into 7.0.2

Conflicts:
	src/Umbraco.Web.UI/Umbraco/PartialViews/Templates/EmptyTemplate.cshtml
	src/Umbraco.Web.UI/umbraco/dialogs/protectPage.aspx
	src/Umbraco.Web/Umbraco.Web.csproj
	src/Umbraco.Web/UmbracoModule.cs
	src/Umbraco.Web/WebApi/UmbracoAuthorizedApiController.cs
ensures webapi plugincontrollers are routed to /backoffice if [IsBackOffice] is specified
Merge remote-tracking branch 'origin/6.2.0' into 7.0.2
ensures auth controller has IsBackOffice specified
Allows DefaultPropertyValueConverters to shadow other default converters, this allows us to have a hierarchy of default converters. This also fixes part of this issue: U4-4030 RelatedLinksEditorValueConvertor can't be overruled and internal links are wrong
Fixes: U4-4030 RelatedLinksEditorValueConvertor can't be overruled and internal links are wrong
Merge pull request #285 from mrdrbob/U4-3831

Fix for U4-3831.
removes the old language.ascx webforms files
fixes language drop down styles - was too big to fit
working on U4-4011 Package installation will require either a full app refresh or we will need to re-lazy load in all of the assets but unfortunately we cannot lazy load in things like directives as angular doesn't like that, we have to re-load the browser.
playing a bit more with re-initializing the app, but think we're def gonna have to do a full browser refresh. To do that we'll have to figure out how to gen a deep link url to the installer complete screen which could include a custom screen from a package.
U4-4046 Rename "empty template" to "empty"
U4-2737 Snippets that are available when creating new MacroScripts should also be available for Partial Views
U4-2737 Snippets that are available when creating new MacroScripts should also be available for Partial Views
Merge branch '7.0.2' of https://github.com/umbraco/Umbraco-CMS into 7.0.2