feat: change buttonsView

* add buttonsView common(complete)
* add buttonsView instructor(notWorking)
* BUGFIX sendSystem meth update files
* BUGFIX updateController meth checkNeedUpdate

instructorbuttongroupwidget.cpp

@@ -0,0 +1,37 @@
+#include "instructorbuttongroupwidget.h"
+#include "ui_instructorbuttongroupwidget.h"
+
+InstructorButtonGroupWidget::InstructorButtonGroupWidget(QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::InstructorButtonGroupWidget)
+{
+    ui->setupUi(this);
+}
+
+void InstructorButtonGroupWidget::initialize(MainWindow *mainWindow)
+{
+    this->mainWindow = mainWindow;
+    hide();
+}
+
+void InstructorButtonGroupWidget::on_loadToServerButton_clicked()
+{
+    mainWindow->loadToServer();
+}
+
+void InstructorButtonGroupWidget::on_undoChangesButton_clicked()
+{
+    mainWindow->undoCurrentChanges();
+}
+
+void InstructorButtonGroupWidget::on_startWithCurrentChangesButton_clicked()
+{
+    mainWindow->startUnityClient();
+}
+
+InstructorButtonGroupWidget::~InstructorButtonGroupWidget()
+{
+    delete ui;
+}
+
+