Added visual information about the need to hold the trims while booting to use USB.

I have a strong feeling that without this information, this will be the most common question going forward.

companion/src/taranisnotfound.cpp

@@ -0,0 +1,19 @@
+#include "taranisnotfound.h"
+#include "ui_taranisnotfound.h"
+
+taranisNotFoundDialog::taranisNotFoundDialog(QWidget *parent) :
+    QDialog(parent),
+    ui(new Ui::taranisNotFoundDialog)
+{
+    ui->setupUi(this);
+}
+
+taranisNotFoundDialog::~taranisNotFoundDialog()
+{
+    delete ui;
+}
+
+void taranisNotFoundDialog::on_OK_clicked()
+{
+  accept();
+}