dont preview by default, Vault::delete_file

src/mainwindow.ui

@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>800</width>
+    <width>900</width>
     <height>600</height>
    </rect>
   </property>
@@ -33,6 +33,11 @@
         <string>Size</string>
        </property>
       </column>
+      <column>
+       <property name="text">
+        <string>Offset</string>
+       </property>
+      </column>
      </widget>
     </item>
     <item>
@@ -46,10 +51,10 @@
      <x>0</x>
      <y>0</y>
      <width>800</width>
-     <height>30</height>
+     <height>32</height>
     </rect>
    </property>
-   <widget class="QMenu" name="menuFile">
+   <widget class="QMenu" name="menuVault">
     <property name="title">
      <string>Vault</string>
     </property>
@@ -57,12 +62,15 @@
     <addaction name="actionOpen"/>
    </widget>
    <widget class="QMenu" name="menuFiles">
+    <property name="enabled">
+     <bool>false</bool>
+    </property>
     <property name="title">
      <string>Files</string>
     </property>
     <addaction name="actionAddFiles"/>
    </widget>
-   <addaction name="menuFile"/>
+   <addaction name="menuVault"/>
    <addaction name="menuFiles"/>
   </widget>
   <action name="actionNew">