Adds AddSourceViewController to add sources by URL or from list of recommended sources

AltStore/Components/AppBannerView.swift

@@ -154,9 +154,21 @@ extension AppBannerView
     {
         self.style = .source
         
-        self.titleLabel.text = source.name
+        let subtitle: String
+        if let text = source.subtitle
+        {
+            subtitle = text
+        }
+        else if let scheme = source.sourceURL.scheme
+        {
+            subtitle = source.sourceURL.absoluteString.replacingOccurrences(of: scheme + "://", with: "")
+        }
+        else
+        {
+            subtitle = source.sourceURL.absoluteString
+        }
         
-        let subtitle = source.subtitle ?? source.sourceURL.absoluteString
+        self.titleLabel.text = source.name
         self.subtitleLabel.text = subtitle
         
         let tintColor = source.effectiveTintColor ?? .altPrimary

AltStore/Components/PillButton.swift

@@ -66,6 +66,8 @@ class PillButton: UIButton
     
     var style: Style = .pill {
         didSet {
+            guard self.style != oldValue else { return }
+            
             if self.style == .custom
             {
                 // Reset insets for custom style.