remove HTML code around "Wallet" (displayed on overview page) and use Qt tags for font settings

src/qt/forms/overviewpage.ui

@@ -78,12 +78,14 @@
         </item>
         <item row="1" column="0">
          <widget class="QLabel" name="label_5">
+          <property name="font">
+           <font>
+            <pointsize>11</pointsize>
+            <bold>true</bold>
+           </font>
+          </property>
           <property name="text">
-           <string>&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
-&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
-p, li { white-space: pre-wrap; }
-&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'Ubuntu'; font-size:11pt; font-weight:400; font-style:normal;&quot;&gt;
-&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;Wallet&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+           <string>Wallet</string>
           </property>
          </widget>
         </item>