Restoring WebView's context to the Activity instead of the app context

Using the application context for a WebView will result in the webview failing to handle dialog pickers (like an HTML SELECT tag for instance).

Also, removed the import for `View.FOCUSABLE` and lint checks can't determine the API level for the import, but it does when it is used inside of the `if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)` check. (one less yellow warning in the IDE)

Author: CDRussell

app/src/main/java/com/duckduckgo/app/browser/BrowserActivity.kt

@@ -32,7 +32,6 @@ import android.view.KeyEvent.KEYCODE_ENTER
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
-import android.view.View.FOCUSABLE
 import android.view.inputmethod.EditorInfo.IME_ACTION_DONE
 import android.webkit.CookieManager
 import android.webkit.WebSettings.MIXED_CONTENT_COMPATIBILITY_MODE
@@ -107,14 +106,14 @@ class BrowserActivity : DuckDuckGoActivity() {
         popupMenu = BrowserPopupMenu(layoutInflater)
     }
 
-    // inspired by https://stackoverflow.com/a/8011027/73479
     private fun createWebView() {
-        webView = NestedWebView(this.applicationContext)
+        webView = NestedWebView(this)
         webView.gone()
         webView.isFocusableInTouchMode = true
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            webView.focusable = FOCUSABLE
+            webView.focusable = View.FOCUSABLE
         }
+
         webViewContainer.addView(webView)
     }