Merge pull request #3464 from SuslikV/dock-area-fix

Fix Qt warning message. UI code cleanup

Author: ferdnyc

src/windows/ui/main-window.ui

@@ -385,9 +385,6 @@
    </widget>
   </widget>
   <widget class="QDockWidget" name="dockTutorial">
-   <property name="enabled">
-    <bool>false</bool>
-   </property>
    <property name="sizePolicy">
     <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
      <horstretch>0</horstretch>
@@ -406,12 +403,6 @@
    <property name="contextMenuPolicy">
     <enum>Qt::NoContextMenu</enum>
    </property>
-   <property name="visible">
-    <bool>false</bool>
-   </property>
-   <property name="autoFillBackground">
-    <bool>false</bool>
-   </property>
    <property name="floating">
     <bool>true</bool>
    </property>
@@ -434,7 +425,7 @@
     <bool>false</bool>
    </property>
    <attribute name="dockWidgetArea">
-    <number>0</number>
+    <number>1</number>
    </attribute>
    <widget class="QWidget" name="dockTutorialContents">
     <property name="focusPolicy">