Implemented application login.

Minor UI improvement.
Fixed memory leaks.

application/mainwindow.ui

@@ -15,8 +15,17 @@
   </property>
   <widget class="QWidget" name="centralWidget">
    <layout class="QHBoxLayout" name="horizontalLayout">
+    <property name="spacing">
+     <number>0</number>
+    </property>
+    <property name="leftMargin">
+     <number>0</number>
+    </property>
     <item>
      <widget class="QWidget" name="navigation" native="true">
+      <property name="enabled">
+       <bool>false</bool>
+      </property>
       <layout class="QVBoxLayout" name="verticalLayout_2"/>
      </widget>
     </item>
@@ -52,6 +61,8 @@
      <string>File</string>
     </property>
     <addaction name="actionOpen_database"/>
+    <addaction name="actionLogin"/>
+    <addaction name="separator"/>
     <addaction name="actionExit"/>
    </widget>
    <addaction name="menuFile"/>
@@ -63,6 +74,7 @@
    <attribute name="toolBarBreak">
     <bool>false</bool>
    </attribute>
+   <addaction name="actionLogin"/>
   </widget>
   <widget class="QStatusBar" name="statusBar"/>
   <action name="actionExit">
@@ -75,8 +87,19 @@
     <string>Open database...</string>
    </property>
   </action>
+  <action name="actionLogin">
+   <property name="icon">
+    <iconset resource="appRc.qrc">
+     <normaloff>:/icons/login_32.png</normaloff>:/icons/login_32.png</iconset>
+   </property>
+   <property name="text">
+    <string>Login...</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
- <resources/>
+ <resources>
+  <include location="appRc.qrc"/>
+ </resources>
  <connections/>
 </ui>