Bugfix FXIOS-13233 [Swift 6 Migration] nonisolated @obj method in ToolbarKit with MenuHelperURLBarInterface (#29142)

nonisolated @obj method

Author: lmarceau

BrowserKit/Sources/Common/Utilities/MenuHelper/MenuHelperURLBarInterface.swift

@@ -7,8 +7,9 @@ import Foundation
 @objc
 public protocol MenuHelperURLBarInterface {
     /// Used to add a paste and go option on the URL bar textfield
+    /// Note: objc methods should always be marked nonisolated as `@MainActor` isolation can't be guaranteed
     @objc
-    optional func menuHelperPasteAndGo()
+    nonisolated optional func menuHelperPasteAndGo()
 }
 
 /// Used to pass in the Client strings for the URL bar textfield menu options

BrowserKit/Sources/ToolbarKit/AddressToolbar/LocationView/LocationView.swift

@@ -600,10 +600,12 @@ final class LocationView: UIView,
         return super.canPerformAction(action, withSender: sender)
     }
 
-    func menuHelperPasteAndGo() {
-        guard let pasteboardContents = UIPasteboard.general.string else { return }
-        delegate?.locationViewDidSubmitText(pasteboardContents)
-        urlTextField.text = pasteboardContents
+    nonisolated func menuHelperPasteAndGo() {
+        ensureMainThread {
+            guard let pasteboardContents = UIPasteboard.general.string else { return }
+            self.delegate?.locationViewDidSubmitText(pasteboardContents)
+            self.urlTextField.text = pasteboardContents
+        }
     }
 
     // MARK: - LocationTextFieldDelegate