Merge pull request #1 from dnnsoftware/development

Fix bug DNN-4057: copy the RegisterClientReference method from WebUtilit...
Fix type

fix a misleading typo (twice)
Fixed DNN-5692: Handle invalid paths in DotNetNuke.Modules.Admin.Extensions.AvailableExtensions.IconExists()
Update _UserList.cshtml

Change query for _UserList.cshtml to only pull users for the current portal.  Prevents a Portal on a shared Host from exposing the contact information for users on other Portals on the host.
Make admin page "User Account" more robust against invalid URL
FilterNodes supports taxonomy tags #

Easily create a "related content" style menu using DDR menu tags.
Similar to what you might find on a news sites
https://cloudup.com/cUP9OIKQsUG
https://cloudup.com/ch6ppibPkIj

1. use dnn taxonomy and tag pages
2. in your ddr menu, specify #tagname

viola, now you have filtered the current nodselector to pages matching
the tags, in a flat non-hierarchy list.
Fixed malformed entry for plSMTPServer.Help (DNN-5538)
DNN-5800 Incorrect tab order on new portals
DNN-5801 Moving tabs in one portal affects tabs in other portals
DNN-5814 Avoid errors on redirect

Instead of terminating the response, run Context.ApplicationInstance.CompleteRequest(); to avoid logging threadabort errors.

https://dnntracker.atlassian.net/browse/DNN-5814
DNN-5807 Fixes to ExtensionPointManager: Independent of HttpContext and thread safe
DNN-5818 fixed IE11 issue with dnn.diagnostic.js
fix for previous commit:
DNN-5800 Incorrect tab order on new portals
DNN-5801 Moving tabs in one portal affects tabs in other portals
DNN-5819 ExpiryDate on a site cannot be removed
Fixes for scheduler

DNN-5731 Schedule Class name cannot contain spaces
DNN-5730 Scheduler Class cannot be edited
DNN-5809 Host clicks into Profile error msg: "Error: ViewProfile" is currently unavailable" renders
DNN-5652 Scheduler throws "System.InvalidOperationException: Sequence contains no matching element" error
add logging code
DNN-5274 SI: Page titles not changing in localization
Added code to close page localization window after pages are localized to ensure that default locale is not updated when user presses update page
DNN-5823 Scheduler - Messaging Dispatch job throws an error every 10 seconds after being edited
Merge pull request #145 from janjonas/DNN-5768

Make admin page "User Account" more robust against invalid URL
Merge pull request #151 from lucasjans/patch-1

DNN-5814 Avoid errors on redirect