Ported from master to next:

#1489: TRACE() output intercepted and shown in Companion (shortcut F6)
#1270: simple Trainer Simulator (shortcut F5)
#1466: telemetry simulator (shorcut F5)

companion/src/simulation/debugoutput.ui

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>DebugOutput</class>
+ <widget class="QDialog" name="DebugOutput">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>711</width>
+    <height>470</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Debug Output</string>
+  </property>
+  <property name="windowIcon">
+   <iconset resource="../companion.qrc">
+    <normaloff>:/icon.png</normaloff>:/icon.png</iconset>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="0" column="0">
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QPlainTextEdit" name="Output">
+       <property name="font">
+        <font>
+         <family>Courier New</family>
+         <pointsize>10</pointsize>
+        </font>
+       </property>
+       <property name="verticalScrollBarPolicy">
+        <enum>Qt::ScrollBarAlwaysOn</enum>
+       </property>
+       <property name="lineWrapMode">
+        <enum>QPlainTextEdit::NoWrap</enum>
+       </property>
+       <property name="readOnly">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <resources>
+  <include location="../companion.qrc"/>
+ </resources>
+ <connections/>
+</ui>