[Qt] add bitcoin logo to about screen

src/qt/forms/helpmessagedialog.ui

@@ -14,6 +14,69 @@
    <string notr="true">Bitcoin Core - Command-line options</string>
   </property>
   <layout class="QHBoxLayout" name="horizontalLayout_2">
+   <property name="spacing">
+    <number>0</number>
+   </property>
+   <property name="leftMargin">
+    <number>12</number>
+   </property>
+   <property name="topMargin">
+    <number>12</number>
+   </property>
+   <property name="rightMargin">
+    <number>12</number>
+   </property>
+   <property name="bottomMargin">
+    <number>12</number>
+   </property>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayoutLogo" stretch="0,0">
+     <property name="leftMargin">
+      <number>0</number>
+     </property>
+     <property name="topMargin">
+      <number>4</number>
+     </property>
+     <property name="rightMargin">
+      <number>0</number>
+     </property>
+     <item>
+      <widget class="QLabel" name="aboutLogo">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Preferred" vsizetype="Ignored">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="maximumSize">
+        <size>
+         <width>100</width>
+         <height>100</height>
+        </size>
+       </property>
+       <property name="pixmap">
+        <pixmap resource="../bitcoin.qrc">:/icons/bitcoin</pixmap>
+       </property>
+       <property name="scaledContents">
+        <bool>true</bool>
+       </property>
+       <property name="alignment">
+        <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QFrame" name="frame">
+       <property name="frameShape">
+        <enum>QFrame::NoFrame</enum>
+       </property>
+       <property name="frameShadow">
+        <enum>QFrame::Raised</enum>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
    <item>
     <layout class="QVBoxLayout" name="verticalLayout">
      <item>
@@ -25,6 +88,9 @@
      </item>
      <item>
       <widget class="QScrollArea" name="scrollArea">
+       <property name="frameShape">
+        <enum>QFrame::NoFrame</enum>
+       </property>
        <property name="verticalScrollBarPolicy">
         <enum>Qt::ScrollBarAlwaysOn</enum>
        </property>
@@ -56,6 +122,22 @@
        </widget>
       </widget>
      </item>
+     <item>
+      <spacer name="verticalSpacer">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeType">
+        <enum>QSizePolicy::Fixed</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>4</width>
+         <height>4</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
      <item>
       <widget class="QDialogButtonBox" name="okButton">
        <property name="orientation">

src/qt/utilitydialog.cpp

@@ -137,6 +137,7 @@ HelpMessageDialog::HelpMessageDialog(QWidget *parent, bool about) :
 
         ui->helpMessage->moveCursor(QTextCursor::Start);
         ui->scrollArea->setVisible(false);
+        ui->aboutLogo->setVisible(false);
     }
 }