Button for clearing the sorting columns

A new button in the "Browse Data" toolbar for clearing the sorting columns
and returning to the default table order.

New icon created as a composition of icons from the Silk icon set.

See issue  #1761

src/MainWindow.cpp

@@ -2087,6 +2087,7 @@ void MainWindow::activateFields(bool enable)
     ui->actionForeignKeyCheck->setEnabled(enable);
     ui->actionOptimize->setEnabled(enable);
     ui->actionClearFilters->setEnabled(enable);
+    ui->actionClearSorting->setEnabled(enable);
     ui->actionSaveFilterAsPopup->setEnabled(enable);
     ui->dockEdit->setEnabled(enable);
     ui->dockPlot->setEnabled(enable);
@@ -3441,6 +3442,15 @@ void MainWindow::on_actionClearFilters_triggered()
     ui->dataTable->filterHeader()->clearFilters();
 }
 
+void MainWindow::on_actionClearSorting_triggered()
+{
+    // Get the current list of sort columns
+    auto& columns = browseTableSettings[currentlyBrowsedTableName()].query.orderBy();
+    columns.clear();
+    // Set cleared vector of sort-by columns
+    m_browseTableModel->sort(columns);
+}
+
 void MainWindow::copyCurrentCreateStatement()
 {
     // Cancel if no field is currently selected

src/MainWindow.h

@@ -280,6 +280,7 @@ private slots:
     void editCondFormats(int column);
     void editEncryption();
     void on_actionClearFilters_triggered();
+    void on_actionClearSorting_triggered();
     void copyCurrentCreateStatement();
     void showDataColumnPopupMenu(const QPoint& pos);
     void showRecordPopupMenu(const QPoint& pos);

src/MainWindow.ui

@@ -177,6 +177,8 @@ You can drag SQL statements from an object row and drop them into other applicat
             </property>
             <addaction name="actionRefresh"/>
             <addaction name="actionClearFilters"/>
+            <addaction name="actionClearSorting"/>
+            <addaction name="separator"/>
             <addaction name="actionSaveFilterAsPopup"/>
             <addaction name="actionPrintTable"/>
             <addaction name="separator"/>
@@ -2600,6 +2602,24 @@ You can drag SQL statements from the Schema column and drop them into the SQL ed
     <string>Browse Table</string>
    </property>
   </action>
+  <action name="actionClearSorting">
+   <property name="icon">
+    <iconset resource="icons/icons.qrc">
+     <normaloff>:/icons/clear_sorting</normaloff>:/icons/clear_sorting</iconset>
+   </property>
+   <property name="text">
+    <string>Clear Sorting</string>
+   </property>
+   <property name="toolTip">
+    <string>Reset the order of rows to the default</string>
+   </property>
+   <property name="statusTip">
+    <string>This button clears the sorting columns specified for the currently browsed table and returns to the default order.</string>
+   </property>
+   <property name="whatsThis">
+    <string>This button clears the sorting columns specified for the currently browsed table and returns to the default order.</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>

src/icons/icons.qrc

@@ -83,5 +83,6 @@
         <file alias="cond_formats">color_swatch.png</file>
         <file alias="clear_cond_formats">clear_cond_formats.png</file>
         <file alias="edit_cond_formats">edit_cond_formats.png</file>
+        <file alias="clear_sorting">clear_sorting.png</file>
     </qresource>
 </RCC>