Issue 5926 - Fix missing string errors

desktop-options.js

Index: desktop-options.js
===================================================================
--- a/desktop-options.js
+++ b/desktop-options.js
@@ -508,13 +508,7 @@
             url: element.getAttribute("url")
           };
 
-          let prefix = element.getAttribute("prefixes");
-          if (prefix)
-          {
-            prefix = prefix.replace(/\W/g, "_");
-            subscription.title = getMessage("options_language_" + prefix);
-          }
-          else
+          if (subscription.recommended != "ads")

[ire, 2017/10/25 09:12:52]

NIT/Suggestion: I think just checking that the type is no ads may be encompass
more than we want (in the future). Assuming that a subscription could be added
with a different type than ads, that doesn't necessarily mean it should be part
of this list. I think it would be clearer to check against a list of the
recommended names/types e.g. 

let recommendedSubscriptions = ["EasyPrivacy", "Fanboy's Social Blocking List"]
if (recommendedSubscriptions.includes(subscription.originalTitle))

[saroyanm, 2017/10/25 13:42:32]

Thanks for bringing this up, yes and no: Currently we do recommend(In the
subscriptions.xml) Languages filter lists which are of type "ads" and two other,
which in this case "EasyPrivacy", "Fanboy's Social Blocking List", so with
current logic whatever is not of type "ads" goes to the "PRIVACY & SECURITY"
section, that was initial intention of current implementation if there were more
we might also consider changing the section title, but this was changed and in
future we will also have custom titles for some other special filter lists like
("Adblock warning removal list, Spam and etc.") which are shown in the More
Filters section, but introduction of that logic will require change in the
current implementation.

The current implementation that you see here I tried to make it consistent with
the current logic we have, see for example ->
https://hg.adblockplus.org/adblockplusui/file/tip/desktop-options.js#l388 

So current logic says, what is not of type ads and recommended, treat
differently - Move to the Privacy & Secutiry section (ex.: Recommendation
section) and add custom titles to it.

In order to addd custom title to other filter lists we will need to add them to
the subscrioptions.xml as well, but in that case this logic will be changed to
the one you have mentioned, or we might introduce additional attribute which
will differentiate the "Privacy" related subscriptions.

[saroyanm, 2017/10/25 13:55:18]

Here is also the relevant discussion where we decided to implement like that ->
https://codereview.adblockplus.org/29478597/diff/29517651/new-options.js#newc...


But it's longer :/

[ire, 2017/10/26 09:22:34]

Thanks very much for the explanation. I understand now and your implementation
looks like the most suitable for this case. If/when we decide to change the rule
of "whatever is not of type "ads" goes to the "PRIVACY & SECURITY" section",
then we can update this as well.

           {
             type = type.replace(/\W/g, "_");
             subscription.title = getMessage("common_feature_" +