+ add clean-up function to recovery dialog

src/Gui/DocumentRecovery.ui

@@ -14,7 +14,7 @@
    <string>Document Recovery</string>
   </property>
   <layout class="QGridLayout" name="gridLayout">
-   <item row="0" column="0">
+   <item row="0" column="0" colspan="2">
     <spacer name="verticalSpacer_2">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
@@ -27,7 +27,7 @@
      </property>
     </spacer>
    </item>
-   <item row="1" column="0">
+   <item row="1" column="0" colspan="2">
     <widget class="QLabel" name="label">
      <property name="text">
       <string>Press 'Start Recovery' to start the recovery process of the doument listed below.
@@ -36,7 +36,7 @@ The 'Status' column shows whether the document could be recovered.</string>
      </property>
     </widget>
    </item>
-   <item row="2" column="0">
+   <item row="2" column="0" colspan="2">
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
@@ -49,15 +49,18 @@ The 'Status' column shows whether the document could be recovered.</string>
      </property>
     </spacer>
    </item>
-   <item row="3" column="0">
+   <item row="3" column="0" colspan="2">
     <widget class="QLabel" name="label_2">
      <property name="text">
       <string>Status of recovered documents:</string>
      </property>
     </widget>
    </item>
-   <item row="4" column="0">
+   <item row="4" column="0" colspan="2">
     <widget class="QTreeWidget" name="treeWidget">
+     <property name="selectionMode">
+      <enum>QAbstractItemView::ExtendedSelection</enum>
+     </property>
      <column>
       <property name="text">
        <string>Document Name</string>
@@ -71,6 +74,16 @@ The 'Status' column shows whether the document could be recovered.</string>
     </widget>
    </item>
    <item row="5" column="0">
+    <widget class="QPushButton" name="buttonCleanup">
+     <property name="enabled">
+      <bool>true</bool>
+     </property>
+     <property name="text">
+      <string>Cleanup...</string>
+     </property>
+    </widget>
+   </item>
+   <item row="5" column="1">
     <widget class="QDialogButtonBox" name="buttonBox">
      <property name="orientation">
       <enum>Qt::Horizontal</enum>