issue-995: Updated iOS 11 layout margins for NavigationBar.

CHANGELOG.md

+## 2.14.0
+
+* [issue-995](https://github.com/CosmicMind/Material/issues/995): Updated iOS 11 layout margins for NavigationBar.
+* [pr-1038](https://github.com/CosmicMind/Material/pull/1038): Merged PR for iOS 11 layout margins fix. 
+
 ## 2.13.7
 ## 2.13.7
 
 
 * Updated TabsController to no longer force the default animation to change between tabs and not return to normal behavior.  
 * Updated TabsController to no longer force the default animation to change between tabs and not return to normal behavior.  

Material.podspec

 Pod::Spec.new do |s|
 Pod::Spec.new do |s|
 	s.name = 'Material'
 	s.name = 'Material'
-	s.version = '2.13.7'
+	s.version = '2.14.0'
 	s.license = 'BSD-3-Clause'
 	s.license = 'BSD-3-Clause'
 	s.summary = 'A UI/UX framework for creating beautiful applications.'
 	s.summary = 'A UI/UX framework for creating beautiful applications.'
 	s.homepage = 'http://cosmicmind.com'
 	s.homepage = 'http://cosmicmind.com'

Motion @ 100bf243

-Subproject commit 654928d706213db2cd9f71281361960177ad0c1d
+Subproject commit 100bf243fd065131bd6572f4ff06993b108a8e7e

Sources/iOS/NavigationBar.swift

@@ -44,7 +44,7 @@ open class NavigationBar: UINavigationBar {
   }
   }
   
   
   /// A preset wrapper around contentEdgeInsets.
   /// A preset wrapper around contentEdgeInsets.
-  open var contentEdgeInsetsPreset = EdgeInsetsPreset.none {
+  open var contentEdgeInsetsPreset = EdgeInsetsPreset.square1 {
     didSet {
     didSet {
       contentEdgeInsets = EdgeInsetsPresetToValue(preset: contentEdgeInsetsPreset)
       contentEdgeInsets = EdgeInsetsPresetToValue(preset: contentEdgeInsetsPreset)
     }
     }
@@ -52,7 +52,7 @@ open class NavigationBar: UINavigationBar {
   
   
   /// A reference to EdgeInsets.
   /// A reference to EdgeInsets.
   @IBInspectable
   @IBInspectable
-  open var contentEdgeInsets = EdgeInsets.zero {
+  open var contentEdgeInsets = EdgeInsetsPresetToValue(preset: .square1) {
     didSet {
     didSet {
       layoutSubviews()
       layoutSubviews()
     }
     }
@@ -67,7 +67,7 @@ open class NavigationBar: UINavigationBar {
   
   
   /// A wrapper around grid.interimSpace.
   /// A wrapper around grid.interimSpace.
   @IBInspectable
   @IBInspectable
-  open var interimSpace: InterimSpace = 0 {
+  open var interimSpace = InterimSpacePresetToValue(preset: .interimSpace3) {
     didSet {
     didSet {
       layoutSubviews()
       layoutSubviews()
     }
     }
@@ -137,8 +137,8 @@ open class NavigationBar: UINavigationBar {
     //iOS 11 added left/right layout margin in subviews of UINavigationBar
     //iOS 11 added left/right layout margin in subviews of UINavigationBar
     //since we do not want to unsafely access private view directly
     //since we do not want to unsafely access private view directly
     //iterate subviews to set `layoutMargin` to zero
     //iterate subviews to set `layoutMargin` to zero
-    for view in subviews {
-      view.layoutMargins = .zero
+    for v in subviews {
+      v.layoutMargins = .zero
     }
     }
     
     
     if let v = topItem {
     if let v = topItem {
@@ -148,6 +148,7 @@ open class NavigationBar: UINavigationBar {
     if let v = backItem {
     if let v = backItem {
       layoutNavigationItem(item: v)
       layoutNavigationItem(item: v)
     }
     }
+    
     layoutDivider()
     layoutDivider()
   }
   }
   
   
@@ -163,8 +164,6 @@ open class NavigationBar: UINavigationBar {
     isTranslucent = false
     isTranslucent = false
     depthPreset = .none
     depthPreset = .none
     contentScaleFactor = Screen.scale
     contentScaleFactor = Screen.scale
-    contentEdgeInsetsPreset = .none
-    interimSpacePreset = .none
     backButtonImage = Icon.cm.arrowBack
     backButtonImage = Icon.cm.arrowBack
     
     
     if #available(iOS 11, *) {
     if #available(iOS 11, *) {