thermostat: main dialog: make bigger buttons

soft/thermostat/src/mainwindow.cpp

@@ -8,6 +8,7 @@
 
 #include <QtWidgets>
 #include <QPushButton>
+#include <QSizePolicy>
 #include <QDateTime>
 #include <QTime>
 #include <QDate>
@@ -64,6 +65,13 @@ MainWindow::MainWindow(QWidget *parent) :
 	}
 	update_state_btn(s->m_state);
 
+	QSizePolicy *szPolicy = new QSizePolicy(QSizePolicy::Minimum,
+						QSizePolicy::MinimumExpanding,
+						QSizePolicy::PushButton);
+
+	menu_btn->setSizePolicy(*szPolicy);
+	m_state_btn.setSizePolicy(*szPolicy);
+
 	QWidget *mainWidget = new QWidget;
 	mainWidget->setLayout(mainLayout);