Rename DeviceTabHeader to TabLabel, so we can use it for all tabs rather than just device tabs

qt/TabLabel.cpp

@@ -0,0 +1,15 @@
+#include "TabLabel.h"
+
+Ui::TabLabel::TabLabel(QString icon, QString name) :
+    QWidget(nullptr),
+    ui(new Ui::TabLabelUi)
+{
+    ui->setupUi(this);
+    ui->icon->setText("<img src=':/" + icon + "' height='16' width='16'  />");
+    ui->name->setText(name);
+}
+
+Ui::TabLabel::~TabLabel()
+{
+    delete ui;
+}