make MasternodeList qt4 compatible, fixes bitcoin#859

Author: UdjinM6

src/qt/forms/masternodelist.ui

@@ -99,6 +99,9 @@
              <attribute name="horizontalHeaderStretchLastSection">
               <bool>true</bool>
              </attribute>
+             <attribute name="ResizeMode">
+              <enum>QHeaderView::Interactive</enum>
+             </attribute>
              <column>
               <property name="text">
                <string>Alias</string>
@@ -224,6 +227,9 @@
            <attribute name="horizontalHeaderStretchLastSection">
             <bool>true</bool>
            </attribute>
+           <attribute name="ResizeMode">
+            <enum>QHeaderView::Interactive</enum>
+           </attribute>
            <column>
             <property name="text">
              <string>Address</string>

src/qt/masternodelist.cpp

@@ -34,15 +34,13 @@ MasternodeList::MasternodeList(const PlatformStyle *platformStyle, QWidget *pare
     int columnActiveWidth = 130;
     int columnLastSeenWidth = 130;
 
-    ui->tableWidgetMyMasternodes->horizontalHeader()->setSectionResizeMode(QHeaderView::Interactive);
     ui->tableWidgetMyMasternodes->setColumnWidth(0, columnAliasWidth);
     ui->tableWidgetMyMasternodes->setColumnWidth(1, columnAddressWidth);
     ui->tableWidgetMyMasternodes->setColumnWidth(2, columnProtocolWidth);
     ui->tableWidgetMyMasternodes->setColumnWidth(3, columnStatusWidth);
     ui->tableWidgetMyMasternodes->setColumnWidth(4, columnActiveWidth);
     ui->tableWidgetMyMasternodes->setColumnWidth(5, columnLastSeenWidth);
 
-    ui->tableWidgetMasternodes->horizontalHeader()->setSectionResizeMode(QHeaderView::Interactive);
     ui->tableWidgetMasternodes->setColumnWidth(0, columnAddressWidth);
     ui->tableWidgetMasternodes->setColumnWidth(1, columnProtocolWidth);
     ui->tableWidgetMasternodes->setColumnWidth(2, columnStatusWidth);