Fix possible crashes similar to #191

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAboutFragment.kt

@@ -104,7 +104,7 @@ class SettingsAboutFragment : SettingsNestedFragment() {
                                 .negativeText(getString(R.string.update_check_ignore))
                                 .onPositive { dialog, which ->
                                     // User output that download has started
-                                    context.toast(R.string.update_check_download_started)
+                                    activity.toast(R.string.update_check_download_started)
                                     // Start download
                                     UpdateDownloader(activity.applicationContext).execute(downloadLink)
                                 }.show()

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsDownloadsFragment.kt

@@ -76,7 +76,7 @@ class SettingsDownloadsFragment : SettingsNestedFragment() {
                 File.separator + getString(R.string.app_name) +
                 File.separator + "downloads"
 
-        return mutableListOf(File(defaultDir)) + context.getExternalFilesDirs("")
+        return mutableListOf(File(defaultDir)) + activity.getExternalFilesDirs("")
     }
 
     override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {