rolled back change creating an Infrastructure.Interfaces namespace, modified IModule interface to be strongly typed (#343)

* upgrade to .NET Core 3.2 Preview 3 and fixes for issues created by #314

* Components based on Bootstrap4 for Sections and  TabStrip to increase productivity and promote uniformity in Module UIs

* rolled back change creating an Infrastructure.Interfaces namespace, modified IModule interface to be strongly typed

Oqtane.Server/Infrastructure/Interfaces/IInstallationManager.cs

@@ -1,4 +1,4 @@
-namespace Oqtane.Infrastructure.Interfaces
+namespace Oqtane.Infrastructure
 {
     public interface IInstallationManager
     {

Oqtane.Server/Infrastructure/Interfaces/ILogManager.cs

@@ -3,7 +3,7 @@ using Oqtane.Enums;
 using Oqtane.Models;
 using Oqtane.Shared;
 
-namespace Oqtane.Infrastructure.Interfaces
+namespace Oqtane.Infrastructure
 {
     public interface ILogManager
     {

Oqtane.Server/Infrastructure/Interfaces/ISiteTemplate.cs

@@ -1,7 +1,7 @@
 using Oqtane.Models;
 using System.Collections.Generic;
 
-namespace Oqtane.Infrastructure.Interfaces
+namespace Oqtane.Infrastructure
 {
     public interface ISiteTemplate
     {

Oqtane.Server/Infrastructure/Interfaces/ISyncManager.cs

@@ -2,7 +2,7 @@
 using System.Collections.Generic;
 using Oqtane.Models;
 
-namespace Oqtane.Infrastructure.Interfaces
+namespace Oqtane.Infrastructure
 {
     public interface ISyncManager
     {