Fix command queue stepping.

Also add instanceDescription to Command class to allow for more verbose command information reporting

src/ui/CommandQueueView.cpp

@@ -34,6 +34,12 @@ void CommandQueueView::onCommandListChanged() {
     ui->lstQueuedCommands->clear();
     const CommandStream& cs(project.m_project_command_stream);
     for(const Command * cmd : cs.m_commands) {
-        ui->lstQueuedCommands->addItem(cmd->name());
+        ui->lstQueuedCommands->addItem(cmd->instanceDescription());
     }
 }
+
+void CommandQueueView::on_btnStep_clicked()
+{
+    Project &project(*Project::get());
+    project.processCommands(1);
+}

src/ui/CommandQueueView.h

@@ -21,6 +21,9 @@ public slots:
 protected:
     void changeEvent(QEvent *e);
 
+private slots:
+    void on_btnStep_clicked();
+
 private:
     Ui::CommandQueueView *ui;
 };

src/ui/CommandQueueView.ui

@@ -19,7 +19,7 @@
      <widget class="QListWidget" name="lstQueuedCommands"/>
     </item>
     <item>
-     <widget class="QPushButton" name="pushButton">
+     <widget class="QPushButton" name="btnStep">
       <property name="text">
        <string>Step</string>
       </property>