Fixed bad server help generation

Author: serhmarch

doc/README.md

@@ -42,8 +42,8 @@ Must be created project collection file `ModbusClient.qhcp`:
 Then `qhelpgenerator` must be executed, compiled help `*.qch` and compiled collection `*.qhc` files must be created:
 
 ```console
-c:\Qt\5.15.2\msvc2019_64\bin>qhelpgenerator "path\to\ModbusTools\doc\output\ModbusClient.qhcp"
-c:\Qt\5.15.2\msvc2019_64\bin>qhelpgenerator "path\to\ModbusTools\doc\output\ModbusServer.qhcp"
+c:\Qt\5.15.2\msvc2019_64\bin\qhelpgenerator.exe "ModbusClient.qhcp"
+c:\Qt\5.15.2\msvc2019_64\bin\qhelpgenerator.exe "ModbusServer.qhcp"
 ```
 
 To check correctness of help generation Qt assistant can be used:

doc/output/ModbusClient.qhc

@@ -8,7 +8,7 @@
             </file>
         </generate>
         <register>
-            <file>output/ModbusServer.qch</file>
+            <file>ModbusServer.qch</file>
         </register>
     </docFiles>
 </QHelpCollectionProject>

doc/output/ModbusServer.chm

@@ -65,6 +65,7 @@ mbCoreHelpUi::mbCoreHelpUi(const QString &relativeCollectionFile, QWidget *paren
     if (!m_helpEngine->setupData())
         mbCore::LogError("HelpSystem", "HelpEngine is not setup. Error: " + m_helpEngine->error());
 
+    //QStringList registeredDocumentations = m_helpEngine->registeredDocumentations();
     QTabWidget* tabWidget = new QTabWidget;
     tabWidget->addTab(m_helpEngine->contentWidget(), "Contents");
     tabWidget->addTab(m_helpEngine->indexWidget  (), "Index"   );