[GODT-961] Update release notes link

* on release notes, check updates if link missing
* on update set release note link
* update version and links with every check
* clean old release notes
* change paths to IEapp notes

internal/frontend/frontend.go

@@ -42,6 +42,7 @@ var (
 type Frontend interface {
 	Loop() error
 	NotifyManualUpdate(update updater.VersionInfo, canInstall bool)
+	SetVersion(update updater.VersionInfo)
 	NotifySilentUpdateInstalled()
 	NotifySilentUpdateError(error)
 }