development: updated default settings for PohotoLibraryController,…

development: updated default settings for PohotoLibraryController, SnackbarController, and PageTabBarController

Sources/iOS/PageTabBarController.swift

@@ -191,6 +191,9 @@ open class PageTabBarController: RootController {
      */
     open override func prepareView() {
         super.prepareView()
+        view.clipsToBounds = true
+        view.backgroundColor = Color.white
+        view.contentScaleFactor = Device.scale
         preparePageTabBar()
     }
     

Sources/iOS/PhotoLibraryController.swift

@@ -47,6 +47,8 @@ open class PhotoLibraryController: UIViewController, PhotoLibraryDelegate {
      when subclassing.
      */
     open func prepareView() {
+        view.clipsToBounds = true
+        view.backgroundColor = Color.white
         view.contentScaleFactor = Device.scale
         preparePhotoLibrary()
     }

Sources/iOS/SnackbarController.swift

@@ -145,6 +145,9 @@ open class SnackbarController: RootController {
      */
     open override func prepareView() {
         super.prepareView()
+        view.clipsToBounds = true
+        view.backgroundColor = Color.white
+        view.contentScaleFactor = Device.scale
         prepareSnackbar()
     }