GH-4071 handle network errors when logging in with MSA as 'soft'

This makes the tokens not expire when such errors happen.

Only applies to MSA, not the XBox and Mojang steps afterwards.
Further testing and improvements are still needed.

libraries/katabasis/include/katabasis/Reply.h

@@ -9,12 +9,14 @@
 
 namespace Katabasis {
 
+constexpr int defaultTimeout = 30 * 1000;
+
 /// A network request/reply pair that can time out.
 class Reply: public QTimer {
     Q_OBJECT
 
 public:
-    Reply(QNetworkReply *reply, int timeOut = 60 * 1000, QObject *parent = 0);
+    Reply(QNetworkReply *reply, int timeOut = defaultTimeout, QObject *parent = 0);
 
 signals:
     void error(QNetworkReply::NetworkError);
@@ -25,6 +27,7 @@ public slots:
 
 public:
     QNetworkReply *reply;
+    bool timedOut = false;
 };
 
 /// List of O2Replies.
@@ -37,7 +40,7 @@ public:
     virtual ~ReplyList();
 
     /// Create a new O2Reply from a QNetworkReply, and add it to this list.
-    void add(QNetworkReply *reply);
+    void add(QNetworkReply *reply, int timeOut = defaultTimeout);
 
     /// Add an O2Reply to the list, while taking ownership of it.
     void add(Reply *reply);