development: updated button defaults

Sources/iOS/Button.swift

@@ -168,6 +168,7 @@ public class Button: UIButton {
      */
 	public func prepareView() {
         contentScaleFactor = Device.scale
+        contentEdgeInsetsPreset = .none
 		prepareVisualLayer()
 	}
 	

Sources/iOS/FlatButton.swift

@@ -41,6 +41,5 @@ public class FlatButton: Button {
 	public override func prepareView() {
 		super.prepareView()
 		cornerRadiusPreset = .cornerRadius1
-		contentEdgeInsetsPreset = .wideRectangle3
 	}
 }

Sources/iOS/IconButton.swift

@@ -40,9 +40,7 @@ public class IconButton: Button {
      */
 	public override func prepareView() {
 		super.prepareView()
-		cornerRadiusPreset = .cornerRadius1
 		pulseAnimation = .center
         shapePreset = .circle
-        contentEdgeInsetsPreset = .none
 	}
 }

Sources/iOS/RaisedButton.swift

@@ -42,7 +42,6 @@ public class RaisedButton: Button {
 		super.prepareView()
 		depthPreset = .depth1
 		cornerRadiusPreset = .cornerRadius1
-		contentEdgeInsetsPreset = .wideRectangle3
 		backgroundColor = Color.white
 	}
 }