Adds app default option

Adds app defaults option for controlling link opening preferences.

Adds browser logic and images.

Browser Manager Updates

- Handles deletion of current browser
- Fixes detection of installed browsers by moving URL Types to LSApplicationQuery
- Updates icons to glyphs
- Context menus update

tidy up

- removes browser specific options and offers in-app or default browser options (can be enabled via a bool)
- adds 1Password as an option
- removes custom wording on context menus

Fixes

- makes sure browser options are available on iPad
- uses VibrantCell
- Changes Settings title to "Open Links In"

iOS/AppDefaults.swift

@@ -54,6 +54,7 @@ final class AppDefaults {
 		static let addWebFeedAccountID = "addWebFeedAccountID"
 		static let addWebFeedFolderName = "addWebFeedFolderName"
 		static let addFolderAccountID = "addFolderAccountID"
+		static let browserPreference = "browserPreference"
 	}
 
 	let isDeveloperBuild: Bool = {
@@ -119,6 +120,18 @@ final class AppDefaults {
 		}
 	}
 	
+	var browserPreference: String {
+		get {
+			guard let preference = UserDefaults.standard.string(forKey: Key.browserPreference) else {
+				return "browser.inapp"
+			}
+			return preference
+		}
+		set {
+			UserDefaults.standard.setValue(newValue, forKey: Key.browserPreference)
+		}
+	}
+	
 	var lastImageCacheFlushDate: Date? {
 		get {
 			return AppDefaults.date(for: Key.lastImageCacheFlushDate)
@@ -191,6 +204,20 @@ final class AppDefaults {
 		}
 	}
 	
+	/// The default behaviour is to open links in the in-app browser, as such, `Browsers.inApp.browserID` is the default.
+	
+//	var openLinksPreferredBrowser: String {
+//		get {
+//			if AppDefaults.store.string(forKey: Key.openLinksPreferredBrowser) == nil {
+//				return Browsers.inApp.browserID
+//			} else {
+//				return AppDefaults.store.string(forKey: Key.openLinksPreferredBrowser)!
+//			}
+//		}
+//
+//		set { AppDefaults.store.setValue(newValue, forKey: Key.openLinksPreferredBrowser) }
+//	}
+	
 	var timelineNumberOfLines: Int {
 		get {
 			return AppDefaults.int(for: Key.timelineNumberOfLines)