ui: disable refresh buttons in trial project

bin/app/data/gui/refresh_view/refresh_view.css

@@ -13,6 +13,10 @@ QPushButton:hover, QPushButton:checked {
 	background: <color:search/button/hover>;
 }
 
+QPushButton:disabled {
+	background: <color:search/button/disabled>;
+}
+
 QPushButton:pressed {
 	background: <color:search/button/press>;
 }

src/lib_gui/qt/element/QtRefreshBar.cpp

@@ -11,6 +11,7 @@
 #include "qt/utility/utilityQt.h"
 #include "settings/ApplicationSettings.h"
 #include "settings/ColorScheme.h"
+#include "isTrial.h"
 
 QtRefreshBar::QtRefreshBar()
 {
@@ -35,6 +36,12 @@ QtRefreshBar::QtRefreshBar()
 	m_autoRefreshButton->setAttribute(Qt::WA_LayoutUsesWidgetRect); // fixes layouting on Mac
 	layout->addWidget(m_autoRefreshButton);
 
+	if (isTrial())
+	{
+		m_refreshButton->setEnabled(false);
+		m_autoRefreshButton->setEnabled(false);
+	}
+
 	connect(m_refreshButton, SIGNAL(clicked()), this, SLOT(refreshClicked()));
 	connect(m_autoRefreshButton, SIGNAL(clicked()), this, SLOT(autoRefreshClicked()));