upgrade themes to latest Bootstrap, fix breaking change to ThemeBase due to IThemeControl being removed

Oqtane.Client/Themes/Controls/Breadcrumbs.razor

@@ -1,6 +1,5 @@
 @namespace Oqtane.Themes.Controls
 @inherits ThemeControlBase       
-@attribute [OqtaneIgnore]
 
 @if (BreadCrumbPages.Any())
 {

Oqtane.Client/Themes/Controls/ControlPanel.razor

@@ -1,6 +1,5 @@
 @namespace Oqtane.Themes.Controls
 @inherits ThemeControlBase
-@attribute [OqtaneIgnore]
 @inject NavigationManager NavigationManager
 @inject IUserService UserService
 @inject IModuleDefinitionService ModuleDefinitionService

Oqtane.Client/Themes/Controls/Login.razor

@@ -1,6 +1,5 @@
 @namespace Oqtane.Themes.Controls
 @inherits LoginBase   
-@attribute [OqtaneIgnore]
 
 <span class="app-login">
     <AuthorizeView>

Oqtane.Client/Themes/Controls/Logo.razor

@@ -1,6 +1,5 @@
 @namespace Oqtane.Themes.Controls
 @inherits ThemeControlBase     
-@attribute [OqtaneIgnore]
 
 @if (PageState.Site.LogoFileId != null)
 {

Oqtane.Client/Themes/Controls/MenuHorizontal.Razor

@@ -1,6 +1,6 @@
 @namespace Oqtane.Themes.Controls
 @inherits MenuBase
-@attribute [OqtaneIgnore]
+
 @if (MenuPages.Any())
 {
     <span class="app-menu-toggler">

Oqtane.Client/Themes/Controls/MenuVertical.razor

@@ -1,6 +1,6 @@
 @namespace Oqtane.Themes.Controls
 @inherits MenuBase
-@attribute [OqtaneIgnore]
+
 @if (MenuPages.Any())
 {
     <span class="app-menu-toggler">

Oqtane.Client/Themes/Controls/UserProfile.razor

@@ -1,6 +1,6 @@
 @namespace Oqtane.Themes.Controls
 @inherits ThemeControlBase   
-@attribute [OqtaneIgnore]
+
 @inject NavigationManager NavigationManager
 
 <span class="app-profile">