Revises Settings + Patreon UI (again)

- Changes background color to red
- Improves Patreon screen
- Adds credits + software licenses

AltStore/Settings/LicensesViewController.swift

@@ -0,0 +1,49 @@
+//
+//  LicensesViewController.swift
+//  AltStore
+//
+//  Created by Riley Testut on 9/6/19.
+//  Copyright © 2019 Riley Testut. All rights reserved.
+//
+
+import UIKit
+
+class LicensesViewController: UIViewController
+{
+    private var _didAppear = false
+    
+    @IBOutlet private var textView: UITextView!
+    
+    override func viewWillAppear(_ animated: Bool)
+    {
+        super.viewWillAppear(animated)
+        
+        self.view.setNeedsLayout()
+        self.view.layoutIfNeeded()
+        
+        // Fix incorrect initial offset on iPhone SE.
+        self.textView.contentOffset.y = 0
+    }
+    
+    override func viewDidAppear(_ animated: Bool)
+    {
+        super.viewDidAppear(animated)
+        
+        _didAppear = true
+    }
+
+    override func viewDidLayoutSubviews()
+    {
+        super.viewDidLayoutSubviews()
+        
+        self.textView.textContainerInset.left = self.view.layoutMargins.left
+        self.textView.textContainerInset.right = self.view.layoutMargins.right
+        self.textView.textContainer.lineFragmentPadding = 0
+        
+        if !_didAppear
+        {
+            // Fix incorrect initial offset on iPhone SE.
+            self.textView.contentOffset.y = 0
+        }
+    }
+}