Ensure there is always book-spinning while linking

This should help people realize that things are happening... Even if
whatever server they're connected to takes a very long time to process a
join request. At some point in the future, the linking process should be
de-serialized.

Sources/Plasma/PubUtilLib/plNetClient/plNetCliAgeJoiner.cpp

@@ -338,6 +338,7 @@ void plNCAgeJoiner::ExecNextOp () {
             ((plResManager*)hsgResMgr::ResMgr())->SetProgressBarProc(nil);
             delete progressBar;
             progressBar = nil;
+            nc->EndTask();
 
             nextOp = kEnableClickables;
         }

Sources/Plasma/PubUtilLib/plNetClient/plNetCliAgeLeaver.cpp

@@ -216,6 +216,7 @@ void plNCAgeLeaver::ExecNextOp () {
 
         //====================================================================
         case kUnloadAge: {
+            nc->BeginTask();
             NetCliGameDisconnect();
 
             // Cull nodes that were part of this age vault (but not shared by the player's vault)

Sources/Plasma/PubUtilLib/plNetClient/plNetClientMgr.cpp

@@ -131,8 +131,7 @@ plNetClientMgr::plNetClientMgr() :
         fLocalPlayerKey(nil),
         fMsgHandler(this),
         fJoinOrder(0),
-        // fProgressBar( nil ),
-        fTaskProgBar( nil ),
+        fTaskProgBar(nullptr),
         fMsgRecorder(nil),
         fServerTimeOffset(0),
         fTimeSamples(0),
@@ -168,8 +167,8 @@ plNetClientMgr::~plNetClientMgr()
 
     if (this==GetInstance())
         SetInstance(nil);       // we're going down boys
-    
     IClearPendingLoads();
+    delete fTaskProgBar;
 }
 
 //
@@ -1467,6 +1466,16 @@ void plNetClientMgr::ClearPendingPagingRoomMsgs()
     fPendingPagingRoomMsgs.clear();
 }
 
+void plNetClientMgr::BeginTask()
+{
+    fTaskProgBar = plProgressMgr::GetInstance()->RegisterOverallOperation(0.f);
+}
+
+void plNetClientMgr::EndTask()
+{
+    delete fTaskProgBar;
+    fTaskProgBar = nullptr;
+}
 
 bool plNetClientMgr::DebugMsgV(const char* fmt, va_list args) const 
 {

Sources/Plasma/PubUtilLib/plNetClient/plNetClientMgr.h

@@ -134,8 +134,7 @@ public:
     };
 
 private:
-    // plOperationProgress  *fProgressBar;
-    plOperationProgress *fTaskProgBar;
+    plOperationProgress* fTaskProgBar;
 
     typedef std::list<PendingLoad*> PendingLoadsList;
     PendingLoadsList fPendingLoads;
@@ -370,6 +369,8 @@ public:
     void NotifyRcvdAllSDLStates();
 
     plOperationProgress* GetTaskProgBar() { return fTaskProgBar; }
+    void BeginTask();
+    void EndTask();
 
     bool DebugMsgV(const char* fmt, va_list args) const;
     bool ErrorMsgV(const char* fmt, va_list args) const;