Moved natural sorting option to "Interface" section

It probably fits slightly better there than in "Saving and Loading".

Author: bjorn

src/tiled/preferencesdialog.ui

@@ -64,16 +64,6 @@
             </property>
            </widget>
           </item>
-          <item row="4" column="0">
-           <widget class="QCheckBox" name="naturalSorting">
-            <property name="toolTip">
-             <string>Sort files numerically (d3, d20) instead of alphabetically (d20, d3)</string>
-            </property>
-            <property name="text">
-             <string>Use natural sorting in Projects view</string>
-            </property>
-           </widget>
-          </item>
          </layout>
         </widget>
        </item>
@@ -273,6 +263,16 @@
             </property>
            </widget>
           </item>
+          <item row="7" column="0" colspan="2">
+           <widget class="QCheckBox" name="naturalSorting">
+            <property name="toolTip">
+             <string>Sort files numerically (d3, d20) instead of alphabetically (d20, d3)</string>
+            </property>
+            <property name="text">
+             <string>Use natural sorting in Projects view</string>
+            </property>
+           </widget>
+          </item>
           <item row="4" column="1" colspan="2">
            <layout class="QHBoxLayout" name="horizontalLayout_3">
             <item>
@@ -702,6 +702,7 @@
   <tabstop>gridMajorY</tabstop>
   <tabstop>objectLineWidth</tabstop>
   <tabstop>openGL</tabstop>
+  <tabstop>naturalSorting</tabstop>
   <tabstop>objectSelectionBehaviorCombo</tabstop>
   <tabstop>preciseTileObjectSelection</tabstop>
   <tabstop>wheelZoomsByDefault</tabstop>

src/tiled/projectdock.cpp

@@ -209,13 +209,9 @@ ProjectView::ProjectView(QWidget *parent)
             this, &ProjectView::onRowsInserted);
 
     connect(this, &QTreeView::expanded,
-            this, [=] (const QModelIndex &index) {
-        mExpandedPaths.insert(filePath(index));
-    });
+            this, [=] (const QModelIndex &index) { mExpandedPaths.insert(filePath(index)); });
     connect(this, &QTreeView::collapsed,
-            this, [=] (const QModelIndex &index) {
-        mExpandedPaths.remove(filePath(index));
-    });
+            this, [=] (const QModelIndex &index) { mExpandedPaths.remove(filePath(index)); });
 
     // Reselect a previously selected path and restore scrollbar after refresh
     connect(mProjectModel, &ProjectModel::aboutToRefresh,