Removed font sizing from unit test control as I don't know how it behaves without a visible window.

src/FactSystem/FactSystemTest.qml

@@ -24,16 +24,14 @@
 import QtQuick 2.2
 import QtQuick.Controls 1.2
 import QGroundControl.FactSystem 1.0
-import QGroundControl.ScreenTools 1.0
 
 Item {
-    property ScreenTools screenTools: ScreenTools { }
     TextInput {
         objectName: "testControl"
         Fact { id: fact; name: "RC_MAP_THROTTLE" }
         text: fact.value
         font.family: "Helvetica"
-        font.pointSize: screenTools.dpiAdjustedPointSize(24);
+        font.pointSize: 24;
         color: "red"
         focus: true
         onAccepted: { fact.value = text; }