Update note for ClickOnce installers.

Update hostname replacement in Publish.ps1.

Remove Motd element.

Update deploy-to-iis.yml

Fix highest version calculation.

Use semaphore to send frames while preparing the next capture.

Fix query string evaluation.

Update README.md

Use new IApplicationConfig interface in RemoteControl page.

Update to .NET 5. (immense#176)

* Retarget .NET 5.

* Delete binaries

* Create ClickOnce publish profile.

* Add IncludeAllContentForSelfExtract

* Retarget .NET 5.

* Delete binaries

* Create ClickOnce publish profile.

* Add IncludeAllContentForSelfExtract

* Remove trim publish option.

* Update Program.cs

* Bump .NET Framework apps up to v4.8.

* Remove use of obsolete DatabaseErrorPageMiddleware.

* Delete ClickOnce-Win10-x64.pubxml