remove force manager check

MVMCoreUI/BaseControllers/ViewController.swift

@@ -349,7 +349,6 @@ import UIKit
     }
     
     open func pageShown() {
-        guard self as? MVMCoreViewManagerProtocol == nil else { return }
         // Update split view properties if this is the current detail controller.
         if self == MVMCoreUISplitViewController.main()?.getCurrentDetailViewController() {
             MVMCoreUISplitViewController.main()?.setBottomProgressBarProgress(bottomProgress() ?? 0)

MVMCoreUI/Managers/SubNav/SubNavManagerController.swift

@@ -111,7 +111,6 @@ open class SubNavManagerController: ViewController, MVMCoreViewManagerProtocol,
     }
     
     open override func pageShown() {
-        super.pageShown()
         hideNavigationBarLine(true)
     }