show wallet.dat size on Settings tab

src/mainwindow.cpp

@@ -353,6 +353,15 @@ void MainWindow::setupSettingsModal() {
         //Use Consolidation
 
         bool isUsingConsolidation = false;
+        int size = 0;
+        QDir zcashdir(rpc->getConnection()->config->zcashDir);
+        QFile WalletSize(zcashdir.filePath("wallet.dat"));
+        if (WalletSize.open(QIODevice::ReadOnly)){
+        size = WalletSize.size() / 1000000;  //when file does open.
+        //QString size1 = QString::number(size) ;
+        settings.WalletSize->setText(QString::number(size));
+        WalletSize.close();
+        } 
         if (rpc->getConnection() != nullptr) {
             isUsingConsolidation = !rpc->getConnection()->config->consolidation.isEmpty() == true;
         }

src/settings.ui

@@ -919,6 +919,45 @@
         <string>Zindex </string>
        </property>
       </widget>
+      <widget class="QLabel" name="WalletSize">
+       <property name="geometry">
+        <rect>
+         <x>330</x>
+         <y>550</y>
+         <width>51</width>
+         <height>17</height>
+        </rect>
+       </property>
+       <property name="text">
+        <string>100</string>
+       </property>
+      </widget>
+      <widget class="QLabel" name="label_22">
+       <property name="geometry">
+        <rect>
+         <x>210</x>
+         <y>550</y>
+         <width>111</width>
+         <height>17</height>
+        </rect>
+       </property>
+       <property name="text">
+        <string>Wallet.dat Size :</string>
+       </property>
+      </widget>
+      <widget class="QLabel" name="label_46">
+       <property name="geometry">
+        <rect>
+         <x>370</x>
+         <y>550</y>
+         <width>41</width>
+         <height>17</height>
+        </rect>
+       </property>
+       <property name="text">
+        <string>MB</string>
+       </property>
+      </widget>
      </widget>
     </widget>
    </item>