Issue 3501 - use hardcoded value until there is a real error message

src/plugin/PluginClass.cpp

Index: src/plugin/PluginClass.cpp
===================================================================
--- a/src/plugin/PluginClass.cpp
+++ b/src/plugin/PluginClass.cpp
@@ -1624,6 +1624,8 @@
         Dictionary* dictionary = Dictionary::GetInstance();
         std::wstring errorText = dictionary->Lookup("updater", "update-error-text");
         std::wstring errorTitle = dictionary->Lookup("updater", "update-error-title");
+        // use hardcoded value until there is a real error message
+        ReplaceString(errorText , L"?1?", L"Unknown error");

[Eric, 2016/01/13 15:14:13]

I'm uncomfortable with putting an English phrase into a translated UI element.
The empty string would be better, which we could do with L"\"\"" as the
substitution string.

I'd actually prefer to change the text in "update-error-text" to remove the
substitution entirely, but that means more translation work. Using the empty
string would be acceptable.

Are the error text strings to be presented to the user already present as
translated strings?

         pClass->notificationMessage.SetTextAndIcon(errorText, errorTitle, TTI_ERROR);
         break;
       }