[enh] add Sakia icon in toolbar

src/sakia/gui/main_window/toolbar/toolbar.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>1000</width>
-    <height>237</height>
+    <height>241</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -139,6 +139,25 @@
      </property>
     </widget>
    </item>
+   <item>
+    <widget class="QLabel" name="label">
+     <property name="maximumSize">
+      <size>
+       <width>40</width>
+       <height>40</height>
+      </size>
+     </property>
+     <property name="text">
+      <string/>
+     </property>
+     <property name="pixmap">
+      <pixmap resource="../../../../../res/icons/sakia.icons.qrc">:/icons/sakia_logo</pixmap>
+     </property>
+     <property name="scaledContents">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
   </layout>
  </widget>
  <resources>