Fix two one-liner issues

app/src/main/java/org/thoughtcrime/securesms/preferences/HelpSettingsActivity.kt

@@ -115,8 +115,7 @@ class HelpSettingsFragment: CorrectedPreferenceFragment() {
             val intent = Intent(Intent.ACTION_VIEW, Uri.parse(url))
             startActivity(intent)
         } catch (e: Exception) {
-            // TODO: Have asked Rebecca about a new string for this to replace the hard-coded text below
-            Toast.makeText(requireActivity(), "Can't open URL", Toast.LENGTH_LONG).show()
+            Toast.makeText(requireActivity(), requireContext().getString(R.string.errorUnknown), Toast.LENGTH_LONG).show()
         }
     }
 

app/src/main/res/xml/preferences_privacy.xml

@@ -39,7 +39,7 @@
             android:key="pref_typing_indicators"
             android:title="@string/typingIndicators"
             android:summary="@string/typingIndicatorsDescription" />
-        <ImagePreference /> <!-- TODO ACL: Need to show a live typing indicator here & remove the "(...)" from the above string -->
+        <!-- TODO ACL: Need to show a live typing indicator here & remove the "(...)" from the above string (if it's there - it might have been removed now) -->
 
     </PreferenceCategory>